445942931 has 4 divisors (see below), whose sum is σ = 509649072. Its totient is φ = 382236792.

The previous prime is 445942897. The next prime is 445942951. The reversal of 445942931 is 139249544.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 445942931 - 2²² = 441748627 is a prime.

It is a super-2 number, since 2×445942931² = 397730195417741522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (445942951) 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, 31853060 + ... + 31853073.

It is an arithmetic number, because the mean of its divisors is an integer number (127412268).

Almost surely, 2^445942931 is an apocalyptic number.

445942931 is a deficient number, since it is larger than the sum of its proper divisors (63706141).

445942931 is an equidigital number, since it uses as much as digits as its factorization.

445942931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63706140.

The product of its digits is 155520, while the sum is 41.

The square root of 445942931 is about 21117.3608909826. The cubic root of 445942931 is about 763.9995357169. Note that the first 3 decimals are identical.

The spelling of 445942931 in words is "four hundred forty-five million, nine hundred forty-two thousand, nine hundred thirty-one".