97908457 has 4 divisors (see below), whose sum is σ = 103667796. Its totient is φ = 92149120.

The previous prime is 97908449. The next prime is 97908469. The reversal of 97908457 is 75480979.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 69488896 + 28419561 = 8336^2 + 5331^2 .

It is a cyclic number.

It is not a de Polignac number, because 97908457 - 2³ = 97908449 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 97908457.

It is not an unprimeable number, because it can be changed into a prime (97908407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2879644 + ... + 2879677.

It is an arithmetic number, because the mean of its divisors is an integer number (25916949).

Almost surely, 2^97908457 is an apocalyptic number.

It is an amenable number.

97908457 is a deficient number, since it is larger than the sum of its proper divisors (5759339).

97908457 is a wasteful number, since it uses less digits than its factorization.

97908457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5759338.

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

The square root of 97908457 is about 9894.8702366428. The cubic root of 97908457 is about 460.9000289838.

The spelling of 97908457 in words is "ninety-seven million, nine hundred eight thousand, four hundred fifty-seven".