72765157 has 2 divisors, whose sum is σ = 72765158. Its totient is φ = 72765156.

The previous prime is 72765139. The next prime is 72765167. The reversal of 72765157 is 75156727.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72743841 + 21316 = 8529^2 + 146^2 .

It is an emirp because it is prime and its reverse (75156727) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72765157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72765127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36382578 + 36382579.

It is an arithmetic number, because the mean of its divisors is an integer number (36382579).

Almost surely, 2^72765157 is an apocalyptic number.

It is an amenable number.

72765157 is a deficient number, since it is larger than the sum of its proper divisors (1).

72765157 is an equidigital number, since it uses as much as digits as its factorization.

72765157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 102900, while the sum is 40.

The square root of 72765157 is about 8530.2495274171. The cubic root of 72765157 is about 417.4852698976.

The spelling of 72765157 in words is "seventy-two million, seven hundred sixty-five thousand, one hundred fifty-seven".