97716517 has 2 divisors, whose sum is σ = 97716518. Its totient is φ = 97716516.

The previous prime is 97716503. The next prime is 97716523. The reversal of 97716517 is 71561779.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68707521 + 29008996 = 8289^2 + 5386^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97716517 is a prime.

It is a super-2 number, since 2×97716517² = 19097035389222578, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97716617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48858258 + 48858259.

It is an arithmetic number, because the mean of its divisors is an integer number (48858259).

Almost surely, 2^97716517 is an apocalyptic number.

It is an amenable number.

97716517 is a deficient number, since it is larger than the sum of its proper divisors (1).

97716517 is an equidigital number, since it uses as much as digits as its factorization.

97716517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 92610, while the sum is 43.

The square root of 97716517 is about 9885.1665135191. The cubic root of 97716517 is about 460.5986487407.

The spelling of 97716517 in words is "ninety-seven million, seven hundred sixteen thousand, five hundred seventeen".