97909956 has 36 divisors (see below), whose sum is σ = 248032512. Its totient is φ = 32565744.

The previous prime is 97909949. The next prime is 97909963. The reversal of 97909956 is 65990979.

It is an interprime number because it is at equal distance from previous prime (97909949) and next prime (97909963).

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15405 + ... + 20811.

It is an arithmetic number, because the mean of its divisors is an integer number (6889792).

Almost surely, 2^97909956 is an apocalyptic number.

It is an amenable number.

97909956 is an abundant number, since it is smaller than the sum of its proper divisors (150122556).

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

97909956 is a wasteful number, since it uses less digits than its factorization.

With its successor (97909957) it forms a Ruth-Aaron pair, since the sum of their distinct prime factors is the same (5915).

97909956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5920 (or 5915 counting only the distinct ones).

The product of its (nonzero) digits is 1377810, while the sum is 54.

The square root of 97909956 is about 9894.9459826722. The cubic root of 97909956 is about 460.9023811321.

The spelling of 97909956 in words is "ninety-seven million, nine hundred nine thousand, nine hundred fifty-six".