7972591 has 4 divisors (see below), whose sum is σ = 8697384. Its totient is φ = 7247800.

The previous prime is 7972589. The next prime is 7972603. The reversal of 7972591 is 1952797.

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 7972591 - 2¹ = 7972589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7972511) 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, 362380 + ... + 362401.

It is an arithmetic number, because the mean of its divisors is an integer number (2174346).

Almost surely, 2^7972591 is an apocalyptic number.

7972591 is a deficient number, since it is larger than the sum of its proper divisors (724793).

7972591 is a wasteful number, since it uses less digits than its factorization.

7972591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 724792.

The product of its digits is 39690, while the sum is 40.

The square root of 7972591 is about 2823.5776950529. The cubic root of 7972591 is about 199.7713303172.

The spelling of 7972591 in words is "seven million, nine hundred seventy-two thousand, five hundred ninety-one".