76971431 has 2 divisors, whose sum is σ = 76971432. Its totient is φ = 76971430.

The previous prime is 76971403. The next prime is 76971437. The reversal of 76971431 is 13417967.

It is a strong prime.

It is an emirp because it is prime and its reverse (13417967) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-76971431 is a prime.

It is a super-2 number, since 2×76971431² = 11849202380375522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (76971437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38485715 + 38485716.

It is an arithmetic number, because the mean of its divisors is an integer number (38485716).

Almost surely, 2^76971431 is an apocalyptic number.

76971431 is a deficient number, since it is larger than the sum of its proper divisors (1).

76971431 is an equidigital number, since it uses as much as digits as its factorization.

76971431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31752, while the sum is 38.

The square root of 76971431 is about 8773.3363665142. The cubic root of 76971431 is about 425.3794645515.

The spelling of 76971431 in words is "seventy-six million, nine hundred seventy-one thousand, four hundred thirty-one".