72816659 has 2 divisors, whose sum is σ = 72816660. Its totient is φ = 72816658.

The previous prime is 72816631. The next prime is 72816671. The reversal of 72816659 is 95661827.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72816659 - 2²⁴ = 56039443 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (72816619) 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, 36408329 + 36408330.

It is an arithmetic number, because the mean of its divisors is an integer number (36408330).

Almost surely, 2^72816659 is an apocalyptic number.

72816659 is a deficient number, since it is larger than the sum of its proper divisors (1).

72816659 is an equidigital number, since it uses as much as digits as its factorization.

72816659 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 44.

The square root of 72816659 is about 8533.2677796961. The cubic root of 72816659 is about 417.5837431068.

The spelling of 72816659 in words is "seventy-two million, eight hundred sixteen thousand, six hundred fifty-nine".