45731997 has 12 divisors (see below), whose sum is σ = 66210300. Its totient is φ = 30417408.

The previous prime is 45731971. The next prime is 45732017. The reversal of 45731997 is 79913754.

45731997 is a `hidden beast` number, since 457 + 3 + 199 + 7 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 38081241 + 7650756 = 6171^2 + 2766^2 .

It is not a de Polignac number, because 45731997 - 2¹⁴ = 45715613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45731957) 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, 1618 + ... + 9699.

It is an arithmetic number, because the mean of its divisors is an integer number (5517525).

Almost surely, 2^45731997 is an apocalyptic number.

It is an amenable number.

45731997 is a deficient number, since it is larger than the sum of its proper divisors (20478303).

45731997 is a wasteful number, since it uses less digits than its factorization.

45731997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11772 (or 11769 counting only the distinct ones).

The product of its digits is 238140, while the sum is 45.

The square root of 45731997 is about 6762.5436782323. The cubic root of 45731997 is about 357.6075852707.

The spelling of 45731997 in words is "forty-five million, seven hundred thirty-one thousand, nine hundred ninety-seven".