97956591 has 4 divisors (see below), whose sum is σ = 130608792. Its totient is φ = 65304392.

The previous prime is 97956587. The next prime is 97956631. The reversal of 97956591 is 19565979.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 97956591 - 2² = 97956587 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97956511) 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, 16326096 + ... + 16326101.

It is an arithmetic number, because the mean of its divisors is an integer number (32652198).

Almost surely, 2^97956591 is an apocalyptic number.

97956591 is a deficient number, since it is larger than the sum of its proper divisors (32652201).

97956591 is a wasteful number, since it uses less digits than its factorization.

97956591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32652200.

The product of its digits is 765450, while the sum is 51.

The square root of 97956591 is about 9897.3022081777. The cubic root of 97956591 is about 460.9755462174.

The spelling of 97956591 in words is "ninety-seven million, nine hundred fifty-six thousand, five hundred ninety-one".