97786957 has 2 divisors, whose sum is σ = 97786958. Its totient is φ = 97786956.

The previous prime is 97786943. The next prime is 97786963. The reversal of 97786957 is 75968779.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82192356 + 15594601 = 9066^2 + 3949^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97786957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97786457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48893478 + 48893479.

It is an arithmetic number, because the mean of its divisors is an integer number (48893479).

Almost surely, 2^97786957 is an apocalyptic number.

It is an amenable number.

97786957 is a deficient number, since it is larger than the sum of its proper divisors (1).

97786957 is an equidigital number, since it uses as much as digits as its factorization.

97786957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6667920, while the sum is 58.

The square root of 97786957 is about 9888.7287858450. The cubic root of 97786957 is about 460.7092979838.

The spelling of 97786957 in words is "ninety-seven million, seven hundred eighty-six thousand, nine hundred fifty-seven".