45397731 has 8 divisors (see below), whose sum is σ = 62617680. Its totient is φ = 29221472.

The previous prime is 45397721. The next prime is 45397739. The reversal of 45397731 is 13779354.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 45397731 - 2¹¹ = 45395683 is a prime.

It is a super-2 number, since 2×45397731² = 4121907959896722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 45397731.

It is not an unprimeable number, because it can be changed into a prime (45397739) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 260820 + ... + 260993.

It is an arithmetic number, because the mean of its divisors is an integer number (7827210).

Almost surely, 2^45397731 is an apocalyptic number.

45397731 is a deficient number, since it is larger than the sum of its proper divisors (17219949).

45397731 is a wasteful number, since it uses less digits than its factorization.

45397731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 521845.

The product of its digits is 79380, while the sum is 39.

The square root of 45397731 is about 6737.7838344666. The cubic root of 45397731 is about 356.7341742929.

The spelling of 45397731 in words is "forty-five million, three hundred ninety-seven thousand, seven hundred thirty-one".