97609640 has 16 divisors (see below), whose sum is σ = 219621780. Its totient is φ = 39043840.

The previous prime is 97609619. The next prime is 97609649. The reversal of 97609640 is 4690679.

It can be written as a sum of positive squares in 2 ways, for example, as 96314596 + 1295044 = 9814^2 + 1138^2 .

It is not an unprimeable number, because it can be changed into a prime (97609649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1220081 + ... + 1220160.

Almost surely, 2^97609640 is an apocalyptic number.

It is an amenable number.

97609640 is an abundant number, since it is smaller than the sum of its proper divisors (122012140).

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

97609640 is a wasteful number, since it uses less digits than its factorization.

97609640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2440252 (or 2440248 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 41.

The square root of 97609640 is about 9879.7591063750. The cubic root of 97609640 is about 460.4306615822.

The spelling of 97609640 in words is "ninety-seven million, six hundred nine thousand, six hundred forty".