72656999 has 2 divisors, whose sum is σ = 72657000. Its totient is φ = 72656998.

The previous prime is 72656993. The next prime is 72657001. The reversal of 72656999 is 99965627.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72656999 - 2²⁰ = 71608423 is a prime.

Together with 72657001, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72656999.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72656993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36328499 + 36328500.

It is an arithmetic number, because the mean of its divisors is an integer number (36328500).

Almost surely, 2^72656999 is an apocalyptic number.

72656999 is a deficient number, since it is larger than the sum of its proper divisors (1).

72656999 is an equidigital number, since it uses as much as digits as its factorization.

72656999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1837080, while the sum is 53.

The square root of 72656999 is about 8523.9074959786. The cubic root of 72656999 is about 417.2783175381.

The spelling of 72656999 in words is "seventy-two million, six hundred fifty-six thousand, nine hundred ninety-nine".