97957631 has 2 divisors, whose sum is σ = 97957632. Its totient is φ = 97957630.

The previous prime is 97957579. The next prime is 97957637. The reversal of 97957631 is 13675979.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (13675979) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 97957631 - 2¹⁸ = 97695487 is a prime.

It is a super-2 number, since 2×97957631² = 19191394942264322, 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 (97957637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48978815 + 48978816.

It is an arithmetic number, because the mean of its divisors is an integer number (48978816).

Almost surely, 2^97957631 is an apocalyptic number.

97957631 is a deficient number, since it is larger than the sum of its proper divisors (1).

97957631 is an equidigital number, since it uses as much as digits as its factorization.

97957631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 357210, while the sum is 47.

The square root of 97957631 is about 9897.3547476081. The cubic root of 97957631 is about 460.9771775960.

The spelling of 97957631 in words is "ninety-seven million, nine hundred fifty-seven thousand, six hundred thirty-one".