45139897 has 12 divisors (see below), whose sum is σ = 50465520. Its totient is φ = 40334360.

The previous prime is 45139867. The next prime is 45139909. The reversal of 45139897 is 79893154.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-45139897 is a prime.

It is a super-2 number, since 2×45139897² = 4075220602341218, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45139867) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3978 + ... + 10300.

It is an arithmetic number, because the mean of its divisors is an integer number (4205460).

Almost surely, 2^45139897 is an apocalyptic number.

It is an amenable number.

45139897 is a deficient number, since it is larger than the sum of its proper divisors (5325623).

45139897 is a wasteful number, since it uses less digits than its factorization.

45139897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6404 (or 6393 counting only the distinct ones).

The product of its digits is 272160, while the sum is 46.

The square root of 45139897 is about 6718.6231476397. The cubic root of 45139897 is about 356.0575407770.

The spelling of 45139897 in words is "forty-five million, one hundred thirty-nine thousand, eight hundred ninety-seven".