7972791 has 8 divisors (see below), whose sum is σ = 10712064. Its totient is φ = 5274360.

The previous prime is 7972781. The next prime is 7972817. The reversal of 7972791 is 1972797.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7972791 - 2⁷ = 7972663 is a prime.

7972791 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7972771) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9751 + ... + 10536.

It is an arithmetic number, because the mean of its divisors is an integer number (1339008).

Almost surely, 2^7972791 is an apocalyptic number.

7972791 is a deficient number, since it is larger than the sum of its proper divisors (2739273).

7972791 is a wasteful number, since it uses less digits than its factorization.

7972791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20421.

The product of its digits is 55566, while the sum is 42.

The square root of 7972791 is about 2823.6131108918. The cubic root of 7972791 is about 199.7730007876.

The spelling of 7972791 in words is "seven million, nine hundred seventy-two thousand, seven hundred ninety-one".