97815944 has 8 divisors (see below), whose sum is σ = 183404910. Its totient is φ = 48907968.

The previous prime is 97815931. The next prime is 97815953. The reversal of 97815944 is 44951879.

It can be written as a sum of positive squares in only one way, i.e., 97812100 + 3844 = 9890^2 + 62^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×97815944² = 19135917801222272, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6113489 + ... + 6113504.

Almost surely, 2^97815944 is an apocalyptic number.

It is an amenable number.

97815944 is a deficient number, since it is larger than the sum of its proper divisors (85588966).

97815944 is a wasteful number, since it uses less digits than its factorization.

97815944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12226999 (or 12226995 counting only the distinct ones).

The product of its digits is 362880, while the sum is 47.

The square root of 97815944 is about 9890.1943358055. The cubic root of 97815944 is about 460.7548161916.

The spelling of 97815944 in words is "ninety-seven million, eight hundred fifteen thousand, nine hundred forty-four".