72336613 has 2 divisors, whose sum is σ = 72336614. Its totient is φ = 72336612.

The previous prime is 72336599. The next prime is 72336623. The reversal of 72336613 is 31663327.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41177889 + 31158724 = 6417^2 + 5582^2 .

It is an emirp because it is prime and its reverse (31663327) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72336613 is a prime.

It is equal to p_4247446 and since 72336613 and 4247446 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 (72336623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36168306 + 36168307.

It is an arithmetic number, because the mean of its divisors is an integer number (36168307).

Almost surely, 2^72336613 is an apocalyptic number.

It is an amenable number.

72336613 is a deficient number, since it is larger than the sum of its proper divisors (1).

72336613 is an equidigital number, since it uses as much as digits as its factorization.

72336613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13608, while the sum is 31.

The square root of 72336613 is about 8505.0933563365. The cubic root of 72336613 is about 416.6640747217.

The spelling of 72336613 in words is "seventy-two million, three hundred thirty-six thousand, six hundred thirteen".