97658857 has 2 divisors, whose sum is σ = 97658858. Its totient is φ = 97658856.

The previous prime is 97658837. The next prime is 97658861. The reversal of 97658857 is 75885679.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 94109401 + 3549456 = 9701^2 + 1884^2 .

It is a cyclic number.

It is not a de Polignac number, because 97658857 - 2¹¹ = 97656809 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 97658798 and 97658807.

It is not a weakly prime, because it can be changed into another prime (97658837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48829428 + 48829429.

It is an arithmetic number, because the mean of its divisors is an integer number (48829429).

Almost surely, 2^97658857 is an apocalyptic number.

It is an amenable number.

97658857 is a deficient number, since it is larger than the sum of its proper divisors (1).

97658857 is an equidigital number, since it uses as much as digits as its factorization.

97658857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4233600, while the sum is 55.

The square root of 97658857 is about 9882.2495920716. The cubic root of 97658857 is about 460.5080351155.

The spelling of 97658857 in words is "ninety-seven million, six hundred fifty-eight thousand, eight hundred fifty-seven".