97664631 has 4 divisors (see below), whose sum is σ = 130219512. Its totient is φ = 65109752.

The previous prime is 97664629. The next prime is 97664681. The reversal of 97664631 is 13646679.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13646679 = 3 ⋅4548893.

It is a cyclic number.

It is not a de Polignac number, because 97664631 - 2¹ = 97664629 is a prime.

It is a super-2 number, since 2×97664631² = 19076760296732322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97664621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16277436 + ... + 16277441.

It is an arithmetic number, because the mean of its divisors is an integer number (32554878).

Almost surely, 2^97664631 is an apocalyptic number.

97664631 is a deficient number, since it is larger than the sum of its proper divisors (32554881).

97664631 is a wasteful number, since it uses less digits than its factorization.

97664631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32554880.

The product of its digits is 163296, while the sum is 42.

The square root of 97664631 is about 9882.5417277136. The cubic root of 97664631 is about 460.5171106569.

The spelling of 97664631 in words is "ninety-seven million, six hundred sixty-four thousand, six hundred thirty-one".