72765673 has 2 divisors, whose sum is σ = 72765674. Its totient is φ = 72765672.

The previous prime is 72765607. The next prime is 72765683. The reversal of 72765673 is 37656727.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71031184 + 1734489 = 8428^2 + 1317^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72765673 is a prime.

It is not a weakly prime, because it can be changed into another prime (72765683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36382836 + 36382837.

It is an arithmetic number, because the mean of its divisors is an integer number (36382837).

Almost surely, 2^72765673 is an apocalyptic number.

It is an amenable number.

72765673 is a deficient number, since it is larger than the sum of its proper divisors (1).

72765673 is an equidigital number, since it uses as much as digits as its factorization.

72765673 is an evil number, because the sum of its binary digits is even.

The product of its digits is 370440, while the sum is 43.

The square root of 72765673 is about 8530.2797726687. The cubic root of 72765673 is about 417.4862567338.

The spelling of 72765673 in words is "seventy-two million, seven hundred sixty-five thousand, six hundred seventy-three".