45400013 has 4 divisors (see below), whose sum is σ = 48070620. Its totient is φ = 42729408.

The previous prime is 45400009. The next prime is 45400021. The reversal of 45400013 is 31000454.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31000454 = 2 ⋅15500227.

It can be written as a sum of positive squares in 2 ways, for example, as 40998409 + 4401604 = 6403^2 + 2098^2 .

It is a cyclic number.

It is not a de Polignac number, because 45400013 - 2² = 45400009 is a prime.

It is a super-2 number, since 2×45400013² = 4122322360800338, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 2670589 = 45400013 / (4 + 5 + 4 + 0 + 0 + 0 + 1 + 3).

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 45399964 and 45400000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45400093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1335278 + ... + 1335311.

It is an arithmetic number, because the mean of its divisors is an integer number (12017655).

Almost surely, 2^45400013 is an apocalyptic number.

It is an amenable number.

45400013 is a deficient number, since it is larger than the sum of its proper divisors (2670607).

45400013 is a wasteful number, since it uses less digits than its factorization.

45400013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2670606.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 45400013 is about 6737.9531758539. The cubic root of 45400013 is about 356.7401514914.

Adding to 45400013 its reverse (31000454), we get a palindrome (76400467).

The spelling of 45400013 in words is "forty-five million, four hundred thousand, thirteen".