97185857 has 2 divisors, whose sum is σ = 97185858. Its totient is φ = 97185856.

The previous prime is 97185839. The next prime is 97185863. The reversal of 97185857 is 75858179.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51609856 + 45576001 = 7184^2 + 6751^2 .

It is a cyclic number.

It is not a de Polignac number, because 97185857 - 2¹⁴ = 97169473 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (97185827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48592928 + 48592929.

It is an arithmetic number, because the mean of its divisors is an integer number (48592929).

Almost surely, 2^97185857 is an apocalyptic number.

It is an amenable number.

97185857 is a deficient number, since it is larger than the sum of its proper divisors (1).

97185857 is an equidigital number, since it uses as much as digits as its factorization.

97185857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 705600, while the sum is 50.

The square root of 97185857 is about 9858.2887460248. The cubic root of 97185857 is about 459.7633581193.

The spelling of 97185857 in words is "ninety-seven million, one hundred eighty-five thousand, eight hundred fifty-seven".