72765697 has 2 divisors, whose sum is σ = 72765698. Its totient is φ = 72765696.

The previous prime is 72765691. The next prime is 72765713. The reversal of 72765697 is 79656727.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45684081 + 27081616 = 6759^2 + 5204^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72765697 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72765697.

It is not a weakly prime, because it can be changed into another prime (72765691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36382848 + 36382849.

It is an arithmetic number, because the mean of its divisors is an integer number (36382849).

Almost surely, 2^72765697 is an apocalyptic number.

It is an amenable number.

72765697 is a deficient number, since it is larger than the sum of its proper divisors (1).

72765697 is an equidigital number, since it uses as much as digits as its factorization.

72765697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1111320, while the sum is 49.

The square root of 72765697 is about 8530.2811794219. The cubic root of 72765697 is about 417.4863026331.

The spelling of 72765697 in words is "seventy-two million, seven hundred sixty-five thousand, six hundred ninety-seven".