97644321 has 12 divisors (see below), whose sum is σ = 141832080. Its totient is φ = 64731480.

The previous prime is 97644307. The next prime is 97644397. The reversal of 97644321 is 12344679.

97644321 is a `hidden beast` number, since 9 + 7 + 644 + 3 + 2 + 1 = 666.

It is not a de Polignac number, because 97644321 - 2⁷ = 97644193 is a prime.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (97645321) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28695 + ... + 31916.

It is an arithmetic number, because the mean of its divisors is an integer number (11819340).

Almost surely, 2^97644321 is an apocalyptic number.

It is an amenable number.

97644321 is a deficient number, since it is larger than the sum of its proper divisors (44187759).

97644321 is a wasteful number, since it uses less digits than its factorization.

97644321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60796 (or 60793 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 97644321 is about 9881.5141046299. The cubic root of 97644321 is about 460.4851859268.

The spelling of 97644321 in words is "ninety-seven million, six hundred forty-four thousand, three hundred twenty-one".