97509920 has 24 divisors (see below), whose sum is σ = 230367564. Its totient is φ = 39003904.

The previous prime is 97509917. The next prime is 97509941. The reversal of 97509920 is 2990579.

It can be written as a sum of positive squares in 2 ways, for example, as 97377424 + 132496 = 9868^2 + 364^2 .

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 3 ways as a sum of consecutive naturals, for example, 304559 + ... + 304878.

Almost surely, 2^97509920 is an apocalyptic number.

It is an amenable number.

97509920 is an abundant number, since it is smaller than the sum of its proper divisors (132857644).

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

97509920 is a wasteful number, since it uses less digits than its factorization.

97509920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 609452 (or 609444 counting only the distinct ones).

The product of its (nonzero) digits is 51030, while the sum is 41.

The square root of 97509920 is about 9874.7111350155. The cubic root of 97509920 is about 460.2738130371.

The spelling of 97509920 in words is "ninety-seven million, five hundred nine thousand, nine hundred twenty".