72804757 has 2 divisors, whose sum is σ = 72804758. Its totient is φ = 72804756.

The previous prime is 72804737. The next prime is 72804769. The reversal of 72804757 is 75740827.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53567761 + 19236996 = 7319^2 + 4386^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72804757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72804707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36402378 + 36402379.

It is an arithmetic number, because the mean of its divisors is an integer number (36402379).

Almost surely, 2^72804757 is an apocalyptic number.

It is an amenable number.

72804757 is a deficient number, since it is larger than the sum of its proper divisors (1).

72804757 is an equidigital number, since it uses as much as digits as its factorization.

72804757 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 109760, while the sum is 40.

The square root of 72804757 is about 8532.5703630266. The cubic root of 72804757 is about 417.5609902890.

The spelling of 72804757 in words is "seventy-two million, eight hundred four thousand, seven hundred fifty-seven".