74997431 has 2 divisors, whose sum is σ = 74997432. Its totient is φ = 74997430.

The previous prime is 74997407. The next prime is 74997467. The reversal of 74997431 is 13479947.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 74997431 - 2⁶ = 74997367 is a prime.

It is a super-2 number, since 2×74997431² = 11249229313199522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74990431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37498715 + 37498716.

It is an arithmetic number, because the mean of its divisors is an integer number (37498716).

Almost surely, 2^74997431 is an apocalyptic number.

74997431 is a deficient number, since it is larger than the sum of its proper divisors (1).

74997431 is an equidigital number, since it uses as much as digits as its factorization.

74997431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 190512, while the sum is 44.

The square root of 74997431 is about 8660.1057152901. The cubic root of 74997431 is about 421.7115175325.

The spelling of 74997431 in words is "seventy-four million, nine hundred ninety-seven thousand, four hundred thirty-one".