97646257 has 2 divisors, whose sum is σ = 97646258. Its totient is φ = 97646256.

The previous prime is 97646251. The next prime is 97646281. The reversal of 97646257 is 75264679.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97140736 + 505521 = 9856^2 + 711^2 .

It is a cyclic number.

It is not a de Polignac number, because 97646257 - 2¹⁵ = 97613489 is a prime.

It is a super-2 number, since 2×97646257² = 19069583012220098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (97646251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48823128 + 48823129.

It is an arithmetic number, because the mean of its divisors is an integer number (48823129).

Almost surely, 2^97646257 is an apocalyptic number.

It is an amenable number.

97646257 is a deficient number, since it is larger than the sum of its proper divisors (1).

97646257 is an equidigital number, since it uses as much as digits as its factorization.

97646257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 635040, while the sum is 46.

The square root of 97646257 is about 9881.6120648404. The cubic root of 97646257 is about 460.4882292628.

It can be divided in two parts, 97646 and 257, that added together give a triangular number (97903 = T₄₄₂).

The spelling of 97646257 in words is "ninety-seven million, six hundred forty-six thousand, two hundred fifty-seven".