72799631 has 2 divisors, whose sum is σ = 72799632. Its totient is φ = 72799630.

The previous prime is 72799589. The next prime is 72799633. The reversal of 72799631 is 13699727.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (13699727) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72799631 is a prime.

It is a super-2 number, since 2×72799631² = 10599572547472322, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 72799633, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72799633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36399815 + 36399816.

It is an arithmetic number, because the mean of its divisors is an integer number (36399816).

Almost surely, 2^72799631 is an apocalyptic number.

72799631 is a deficient number, since it is larger than the sum of its proper divisors (1).

72799631 is an equidigital number, since it uses as much as digits as its factorization.

72799631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 142884, while the sum is 44.

The square root of 72799631 is about 8532.2699793197. The cubic root of 72799631 is about 417.5511902523.

The spelling of 72799631 in words is "seventy-two million, seven hundred ninety-nine thousand, six hundred thirty-one".