97689578121 has 32 divisors (see below), whose sum is σ = 147086150400. Its totient is φ = 64068036480.

The previous prime is 97689578093. The next prime is 97689578137. The reversal of 97689578121 is 12187598679.

It is not a de Polignac number, because 97689578121 - 2²⁷ = 97555360393 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (97689578191) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 820315 + ... + 931823.

It is an arithmetic number, because the mean of its divisors is an integer number (4596442200).

Almost surely, 2^97689578121 is an apocalyptic number.

It is an amenable number.

97689578121 is a deficient number, since it is larger than the sum of its proper divisors (49396572279).

97689578121 is a wasteful number, since it uses less digits than its factorization.

97689578121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112046 (or 112040 counting only the distinct ones).

The product of its digits is 15240960, while the sum is 63.

The spelling of 97689578121 in words is "ninety-seven billion, six hundred eighty-nine million, five hundred seventy-eight thousand, one hundred twenty-one".