97977725 has 6 divisors (see below), whose sum is σ = 121492410. Its totient is φ = 78382160.

The previous prime is 97977707. The next prime is 97977727. The reversal of 97977725 is 52777979.

It can be written as a sum of positive squares in 3 ways, for example, as 106276 + 97871449 = 326^2 + 9893^2 .

It is not a de Polignac number, because 97977725 - 2¹⁶ = 97912189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97977727) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1959530 + ... + 1959579.

It is an arithmetic number, because the mean of its divisors is an integer number (20248735).

Almost surely, 2^97977725 is an apocalyptic number.

It is an amenable number.

97977725 is a deficient number, since it is larger than the sum of its proper divisors (23514685).

97977725 is a wasteful number, since it uses less digits than its factorization.

97977725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3919119 (or 3919114 counting only the distinct ones).

The product of its digits is 1944810, while the sum is 53.

The square root of 97977725 is about 9898.3698152777. The cubic root of 97977725 is about 461.0086954472.

The spelling of 97977725 in words is "ninety-seven million, nine hundred seventy-seven thousand, seven hundred twenty-five".