97668517 has 2 divisors, whose sum is σ = 97668518. Its totient is φ = 97668516.

The previous prime is 97668509. The next prime is 97668539. The reversal of 97668517 is 71586679.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 92428996 + 5239521 = 9614^2 + 2289^2 .

It is a cyclic number.

It is not a de Polignac number, because 97668517 - 2³ = 97668509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97668547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48834258 + 48834259.

It is an arithmetic number, because the mean of its divisors is an integer number (48834259).

Almost surely, 2^97668517 is an apocalyptic number.

It is an amenable number.

97668517 is a deficient number, since it is larger than the sum of its proper divisors (1).

97668517 is an equidigital number, since it uses as much as digits as its factorization.

97668517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 635040, while the sum is 49.

The square root of 97668517 is about 9882.7383350972. The cubic root of 97668517 is about 460.5232184489.

The spelling of 97668517 in words is "ninety-seven million, six hundred sixty-eight thousand, five hundred seventeen".