72816619 has 2 divisors, whose sum is σ = 72816620. Its totient is φ = 72816618.

The previous prime is 72816617. The next prime is 72816631. The reversal of 72816619 is 91661827.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72816619 - 2¹ = 72816617 is a prime.

It is a super-2 number, since 2×72816619² = 10604520005182322, which contains 22 as substring.

Together with 72816617, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (72816617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36408309 + 36408310.

It is an arithmetic number, because the mean of its divisors is an integer number (36408310).

Almost surely, 2^72816619 is an apocalyptic number.

72816619 is a deficient number, since it is larger than the sum of its proper divisors (1).

72816619 is an equidigital number, since it uses as much as digits as its factorization.

72816619 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 40.

The square root of 72816619 is about 8533.2654359278. The cubic root of 72816619 is about 417.5836666438.

The spelling of 72816619 in words is "seventy-two million, eight hundred sixteen thousand, six hundred nineteen".