45493813 has 4 divisors (see below), whose sum is σ = 45852160. Its totient is φ = 45135468.

The previous prime is 45493787. The next prime is 45493823. The reversal of 45493813 is 31839454.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31839454 = 2 ⋅15919727.

It is a cyclic number.

It is not a de Polignac number, because 45493813 - 2⁵ = 45493781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45493823) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 178983 + ... + 179236.

It is an arithmetic number, because the mean of its divisors is an integer number (11463040).

Almost surely, 2^45493813 is an apocalyptic number.

It is an amenable number.

45493813 is a deficient number, since it is larger than the sum of its proper divisors (358347).

45493813 is a wasteful number, since it uses less digits than its factorization.

45493813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358346.

The product of its digits is 51840, while the sum is 37.

The square root of 45493813 is about 6744.9101550725. The cubic root of 45493813 is about 356.9856668942.

The spelling of 45493813 in words is "forty-five million, four hundred ninety-three thousand, eight hundred thirteen".