7971630431 has 2 divisors, whose sum is σ = 7971630432. Its totient is φ = 7971630430.

The previous prime is 7971630397. The next prime is 7971630493. The reversal of 7971630431 is 1340361797.

It is a weak prime.

It is an emirp because it is prime and its reverse (1340361797) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7971630431 is a prime.

It is a super-2 number, since 2×7971630431² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7971633431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3985815215 + 3985815216.

It is an arithmetic number, because the mean of its divisors is an integer number (3985815216).

Almost surely, 2^7971630431 is an apocalyptic number.

7971630431 is a deficient number, since it is larger than the sum of its proper divisors (1).

7971630431 is an equidigital number, since it uses as much as digits as its factorization.

7971630431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 95256, while the sum is 41.

The square root of 7971630431 is about 89283.9875397599. The cubic root of 7971630431 is about 1997.6330691743.

The spelling of 7971630431 in words is "seven billion, nine hundred seventy-one million, six hundred thirty thousand, four hundred thirty-one".