97636989 has 16 divisors (see below), whose sum is σ = 132416192. Its totient is φ = 63980928.

The previous prime is 97636937. The next prime is 97636993. The reversal of 97636989 is 98963679.

It is not a de Polignac number, because 97636989 - 2⁸ = 97636733 is a prime.

It is a super-2 number, since 2×97636989² = 19065963241972242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97636489) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86382 + ... + 87504.

It is an arithmetic number, because the mean of its divisors is an integer number (8276012).

Almost surely, 2^97636989 is an apocalyptic number.

It is an amenable number.

97636989 is a deficient number, since it is larger than the sum of its proper divisors (34779203).

97636989 is a wasteful number, since it uses less digits than its factorization.

97636989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1596.

The product of its digits is 4408992, while the sum is 57.

The square root of 97636989 is about 9881.1431018886. The cubic root of 97636989 is about 460.4736598703.

The spelling of 97636989 in words is "ninety-seven million, six hundred thirty-six thousand, nine hundred eighty-nine".