72847825 has 6 divisors (see below), whose sum is σ = 90331334. Its totient is φ = 58278240.

The previous prime is 72847813. The next prime is 72847829. The reversal of 72847825 is 52874827.

It can be written as a sum of positive squares in 3 ways, for example, as 25897921 + 46949904 = 5089^2 + 6852^2 .

It is not a de Polignac number, because 72847825 - 2²⁵ = 39293393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72847829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1456932 + ... + 1456981.

Almost surely, 2^72847825 is an apocalyptic number.

It is an amenable number.

72847825 is a deficient number, since it is larger than the sum of its proper divisors (17483509).

72847825 is a wasteful number, since it uses less digits than its factorization.

72847825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2913923 (or 2913918 counting only the distinct ones).

The product of its digits is 250880, while the sum is 43.

The square root of 72847825 is about 8535.0937311784. The cubic root of 72847825 is about 417.6433107882.

The spelling of 72847825 in words is "seventy-two million, eight hundred forty-seven thousand, eight hundred twenty-five".