7272991 has 32 divisors (see below), whose sum is σ = 9331200. Its totient is φ = 5575680.

The previous prime is 7272971. The next prime is 7273001. The reversal of 7272991 is 1992727.

It is not a de Polignac number, because 7272991 - 2¹³ = 7264799 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7272991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7272911) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 81675 + ... + 81763.

It is an arithmetic number, because the mean of its divisors is an integer number (291600).

Almost surely, 2^7272991 is an apocalyptic number.

7272991 is a deficient number, since it is larger than the sum of its proper divisors (2058209).

7272991 is a wasteful number, since it uses less digits than its factorization.

7272991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159.

The product of its digits is 15876, while the sum is 37.

The square root of 7272991 is about 2696.8483457547. The cubic root of 7272991 is about 193.7482031051.

The spelling of 7272991 in words is "seven million, two hundred seventy-two thousand, nine hundred ninety-one".