72765911 has 2 divisors, whose sum is σ = 72765912. Its totient is φ = 72765910.

The previous prime is 72765907. The next prime is 72765929. The reversal of 72765911 is 11956727.

It is a weak prime.

It is an emirp because it is prime and its reverse (11956727) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72765911 - 2² = 72765907 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72765211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36382955 + 36382956.

It is an arithmetic number, because the mean of its divisors is an integer number (36382956).

Almost surely, 2^72765911 is an apocalyptic number.

72765911 is a deficient number, since it is larger than the sum of its proper divisors (1).

72765911 is an equidigital number, since it uses as much as digits as its factorization.

72765911 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26460, while the sum is 38.

The square root of 72765911 is about 8530.2937229617. The cubic root of 72765911 is about 417.4867119009.

The spelling of 72765911 in words is "seventy-two million, seven hundred sixty-five thousand, nine hundred eleven".