97638291 has 10 divisors (see below), whose sum is σ = 145854852. Its totient is φ = 65092140.

The previous prime is 97638263. The next prime is 97638311. The reversal of 97638291 is 19283679.

97638291 is a `hidden beast` number, since 9 + 7 + 638 + 2 + 9 + 1 = 666.

It is not a de Polignac number, because 97638291 - 2⁹ = 97637779 is a prime.

It is not an unprimeable number, because it can be changed into a prime (97638091) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 602625 + ... + 602786.

Almost surely, 2^97638291 is an apocalyptic number.

97638291 is a deficient number, since it is larger than the sum of its proper divisors (48216561).

97638291 is a wasteful number, since it uses less digits than its factorization.

97638291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1205423 (or 1205414 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 97638291 is about 9881.2089847346. The cubic root of 97638291 is about 460.4757066835.

The spelling of 97638291 in words is "ninety-seven million, six hundred thirty-eight thousand, two hundred ninety-one".