72335917 has 2 divisors, whose sum is σ = 72335918. Its totient is φ = 72335916.

The previous prime is 72335881. The next prime is 72335981. The reversal of 72335917 is 71953327.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64304361 + 8031556 = 8019^2 + 2834^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72335917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72330917) 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, 36167958 + 36167959.

It is an arithmetic number, because the mean of its divisors is an integer number (36167959).

Almost surely, 2^72335917 is an apocalyptic number.

It is an amenable number.

72335917 is a deficient number, since it is larger than the sum of its proper divisors (1).

72335917 is an equidigital number, since it uses as much as digits as its factorization.

72335917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 39690, while the sum is 37.

The square root of 72335917 is about 8505.0524395797. The cubic root of 72335917 is about 416.6627383807.

The spelling of 72335917 in words is "seventy-two million, three hundred thirty-five thousand, nine hundred seventeen".