72232613 has 2 divisors, whose sum is σ = 72232614. Its totient is φ = 72232612.

The previous prime is 72232603. The next prime is 72232619. The reversal of 72232613 is 31623227.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51008164 + 21224449 = 7142^2 + 4607^2 .

It is a cyclic number.

It is not a de Polignac number, because 72232613 - 2²² = 68038309 is a prime.

It is equal to p_4241663 and since 72232613 and 4241663 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72232619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36116306 + 36116307.

It is an arithmetic number, because the mean of its divisors is an integer number (36116307).

Almost surely, 2^72232613 is an apocalyptic number.

It is an amenable number.

72232613 is a deficient number, since it is larger than the sum of its proper divisors (1).

72232613 is an equidigital number, since it uses as much as digits as its factorization.

72232613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3024, while the sum is 26.

The square root of 72232613 is about 8498.9771737545. The cubic root of 72232613 is about 416.4642964648.

The spelling of 72232613 in words is "seventy-two million, two hundred thirty-two thousand, six hundred thirteen".