45649013 has 4 divisors (see below), whose sum is σ = 45663180. Its totient is φ = 45634848.

The previous prime is 45649003. The next prime is 45649027. The reversal of 45649013 is 31094654.

45649013 = 4777² + 4778².

45649013 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 31094654 = 2 ⋅15547327.

It can be written as a sum of positive squares in 2 ways, for example, as 22829284 + 22819729 = 4778^2 + 4777^2 .

It is a cyclic number.

It is not a de Polignac number, because 45649013 - 2¹² = 45644917 is a prime.

It is a super-4 number, since 4×45649013⁴ (a number of 32 digits) contains 4444 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45649003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 353 + ... + 9561.

It is an arithmetic number, because the mean of its divisors is an integer number (11415795).

Almost surely, 2^45649013 is an apocalyptic number.

45649013 is the 4778-th centered square number.

It is an amenable number.

45649013 is a deficient number, since it is larger than the sum of its proper divisors (14167).

45649013 is an equidigital number, since it uses as much as digits as its factorization.

45649013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14166.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 45649013 is about 6756.4053312394. The cubic root of 45649013 is about 357.3911527399.

The spelling of 45649013 in words is "forty-five million, six hundred forty-nine thousand, thirteen".