97977906 has 24 divisors (see below), whose sum is σ = 228615660. Its totient is φ = 30146976.

The previous prime is 97977883. The next prime is 97977923. The reversal of 97977906 is 60977979.

It can be written as a sum of positive squares in 2 ways, for example, as 94770225 + 3207681 = 9735^2 + 1791^2 .

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 209121 + ... + 209588.

Almost surely, 2^97977906 is an apocalyptic number.

97977906 is an abundant number, since it is smaller than the sum of its proper divisors (130637754).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

97977906 is a wasteful number, since it uses less digits than its factorization.

97977906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418730 (or 418727 counting only the distinct ones).

The product of its (nonzero) digits is 1500282, while the sum is 54.

The square root of 97977906 is about 9898.3789581931. The cubic root of 97977906 is about 461.0089793299.

The spelling of 97977906 in words is "ninety-seven million, nine hundred seventy-seven thousand, nine hundred six".