72679613 has 2 divisors, whose sum is σ = 72679614. Its totient is φ = 72679612.

The previous prime is 72679577. The next prime is 72679627. The reversal of 72679613 is 31697627.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64850809 + 7828804 = 8053^2 + 2798^2 .

It is a cyclic number.

It is not a de Polignac number, because 72679613 - 2⁸ = 72679357 is a prime.

It is a super-2 number, since 2×72679613² = 10564652291659538, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72670613) 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, 36339806 + 36339807.

It is an arithmetic number, because the mean of its divisors is an integer number (36339807).

Almost surely, 2^72679613 is an apocalyptic number.

It is an amenable number.

72679613 is a deficient number, since it is larger than the sum of its proper divisors (1).

72679613 is an equidigital number, since it uses as much as digits as its factorization.

72679613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 95256, while the sum is 41.

The square root of 72679613 is about 8525.2338970846. The cubic root of 72679613 is about 417.3216047331.

The spelling of 72679613 in words is "seventy-two million, six hundred seventy-nine thousand, six hundred thirteen".