97640626 has 8 divisors (see below), whose sum is σ = 148862124. Its totient is φ = 48019920.

The previous prime is 97640617. The next prime is 97640629. The reversal of 97640626 is 62604679.

It can be written as a sum of positive squares in 2 ways, for example, as 59213025 + 38427601 = 7695^2 + 6199^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (97640629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 400045 + ... + 400288.

Almost surely, 2^97640626 is an apocalyptic number.

97640626 is the 6250-th centered pentagonal number.

97640626 is a deficient number, since it is larger than the sum of its proper divisors (51221498).

97640626 is a wasteful number, since it uses less digits than its factorization.

97640626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 800396.

The product of its (nonzero) digits is 108864, while the sum is 40.

The square root of 97640626 is about 9881.3271375863. The cubic root of 97640626 is about 460.4793773821.

The spelling of 97640626 in words is "ninety-seven million, six hundred forty thousand, six hundred twenty-six".