72764317 has 2 divisors, whose sum is σ = 72764318. Its totient is φ = 72764316.

The previous prime is 72764273. The next prime is 72764323. The reversal of 72764317 is 71346727.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69455556 + 3308761 = 8334^2 + 1819^2 .

It is an emirp because it is prime and its reverse (71346727) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72764317 - 2⁷ = 72764189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72764327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36382158 + 36382159.

It is an arithmetic number, because the mean of its divisors is an integer number (36382159).

Almost surely, 2^72764317 is an apocalyptic number.

It is an amenable number.

72764317 is a deficient number, since it is larger than the sum of its proper divisors (1).

72764317 is an equidigital number, since it uses as much as digits as its factorization.

72764317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 49392, while the sum is 37.

The square root of 72764317 is about 8530.2002907317. The cubic root of 72764317 is about 417.4836634099.

The spelling of 72764317 in words is "seventy-two million, seven hundred sixty-four thousand, three hundred seventeen".