97631531 has 2 divisors, whose sum is σ = 97631532. Its totient is φ = 97631530.

The previous prime is 97631503. The next prime is 97631551. The reversal of 97631531 is 13513679.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 97631531 - 2⁶ = 97631467 is a prime.

It is a super-2 number, since 2×97631531² = 19063831690807922, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 97631491 and 97631500.

It is not a weakly prime, because it can be changed into another prime (97631551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48815765 + 48815766.

It is an arithmetic number, because the mean of its divisors is an integer number (48815766).

Almost surely, 2^97631531 is an apocalyptic number.

97631531 is a deficient number, since it is larger than the sum of its proper divisors (1).

97631531 is an equidigital number, since it uses as much as digits as its factorization.

97631531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17010, while the sum is 35.

The square root of 97631531 is about 9880.8669154078. The cubic root of 97631531 is about 460.4650794061.

The spelling of 97631531 in words is "ninety-seven million, six hundred thirty-one thousand, five hundred thirty-one".