97977575 has 12 divisors (see below), whose sum is σ = 122698248. Its totient is φ = 77604000.

The previous prime is 97977571. The next prime is 97977589. The reversal of 97977575 is 57577979.

It is not a de Polignac number, because 97977575 - 2² = 97977571 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 97977575.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97977571) 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, 16877 + ... + 21926.

It is an arithmetic number, because the mean of its divisors is an integer number (10224854).

Almost surely, 2^97977575 is an apocalyptic number.

97977575 is a deficient number, since it is larger than the sum of its proper divisors (24720673).

97977575 is a wasteful number, since it uses less digits than its factorization.

97977575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38914 (or 38909 counting only the distinct ones).

The product of its digits is 4862025, while the sum is 56.

The square root of 97977575 is about 9898.3622382695. The cubic root of 97977575 is about 461.0084601851.

The spelling of 97977575 in words is "ninety-seven million, nine hundred seventy-seven thousand, five hundred seventy-five".