97716257 has 2 divisors, whose sum is σ = 97716258. Its totient is φ = 97716256.

The previous prime is 97716251. The next prime is 97716271. The reversal of 97716257 is 75261779.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97693456 + 22801 = 9884^2 + 151^2 .

It is an emirp because it is prime and its reverse (75261779) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 97716257 - 2⁶ = 97716193 is a prime.

It is not a weakly prime, because it can be changed into another prime (97716251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48858128 + 48858129.

It is an arithmetic number, because the mean of its divisors is an integer number (48858129).

Almost surely, 2^97716257 is an apocalyptic number.

It is an amenable number.

97716257 is a deficient number, since it is larger than the sum of its proper divisors (1).

97716257 is an equidigital number, since it uses as much as digits as its factorization.

97716257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 185220, while the sum is 44.

The square root of 97716257 is about 9885.1533624927. The cubic root of 97716257 is about 460.5982402265.

The spelling of 97716257 in words is "ninety-seven million, seven hundred sixteen thousand, two hundred fifty-seven".