97871972 has 24 divisors (see below), whose sum is σ = 188569920. Its totient is φ = 44076960.

The previous prime is 97871959. The next prime is 97871987. The reversal of 97871972 is 27917879.

It is a self number, because there is not a number n which added to its sum of digits gives 97871972.

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 7 ways as a sum of consecutive naturals, for example, 5408 + ... + 14999.

It is an arithmetic number, because the mean of its divisors is an integer number (7857080).

Almost surely, 2^97871972 is an apocalyptic number.

It is an amenable number.

97871972 is a deficient number, since it is larger than the sum of its proper divisors (90697948).

97871972 is a wasteful number, since it uses less digits than its factorization.

97871972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20531 (or 20529 counting only the distinct ones).

The product of its digits is 444528, while the sum is 50.

The square root of 97871972 is about 9893.0264327960. The cubic root of 97871972 is about 460.8427713260.

The spelling of 97871972 in words is "ninety-seven million, eight hundred seventy-one thousand, nine hundred seventy-two".