72257579 has 2 divisors, whose sum is σ = 72257580. Its totient is φ = 72257578.

The previous prime is 72257567. The next prime is 72257593. The reversal of 72257579 is 97575227.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72257579 - 2²⁰ = 71209003 is a prime.

It is not a weakly prime, because it can be changed into another prime (72257279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36128789 + 36128790.

It is an arithmetic number, because the mean of its divisors is an integer number (36128790).

Almost surely, 2^72257579 is an apocalyptic number.

72257579 is a deficient number, since it is larger than the sum of its proper divisors (1).

72257579 is an equidigital number, since it uses as much as digits as its factorization.

72257579 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 308700, while the sum is 44.

The square root of 72257579 is about 8500.4458118383. The cubic root of 72257579 is about 416.5122722545.

The spelling of 72257579 in words is "seventy-two million, two hundred fifty-seven thousand, five hundred seventy-nine".