97931357 has 2 divisors, whose sum is σ = 97931358. Its totient is φ = 97931356.

The previous prime is 97931311. The next prime is 97931359. The reversal of 97931357 is 75313979.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72267001 + 25664356 = 8501^2 + 5066^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97931357 is a prime.

It is a super-2 number, since 2×97931357² = 19181101367722898, which contains 22 as substring.

Together with 97931359, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97931359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48965678 + 48965679.

It is an arithmetic number, because the mean of its divisors is an integer number (48965679).

Almost surely, 2^97931357 is an apocalyptic number.

It is an amenable number.

97931357 is a deficient number, since it is larger than the sum of its proper divisors (1).

97931357 is an equidigital number, since it uses as much as digits as its factorization.

97931357 is an evil number, because the sum of its binary digits is even.

The product of its digits is 178605, while the sum is 44.

The square root of 97931357 is about 9896.0273342387. The cubic root of 97931357 is about 460.9359597850.

The spelling of 97931357 in words is "ninety-seven million, nine hundred thirty-one thousand, three hundred fifty-seven".