97572981 has 16 divisors (see below), whose sum is σ = 142571520. Its totient is φ = 58865520.

The previous prime is 97572953. The next prime is 97573001. The reversal of 97572981 is 18927579.

It is not a de Polignac number, because 97572981 - 2¹⁵ = 97540213 is a prime.

It is a super-2 number, since 2×97572981² = 19040973242452722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 97572981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97572281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 730 + ... + 13988.

It is an arithmetic number, because the mean of its divisors is an integer number (8910720).

Almost surely, 2^97572981 is an apocalyptic number.

It is an amenable number.

97572981 is a deficient number, since it is larger than the sum of its proper divisors (44998539).

97572981 is a wasteful number, since it uses less digits than its factorization.

97572981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13496.

The product of its digits is 317520, while the sum is 48.

The square root of 97572981 is about 9877.9036743633. The cubic root of 97572981 is about 460.3730134471.

The spelling of 97572981 in words is "ninety-seven million, five hundred seventy-two thousand, nine hundred eighty-one".