72956761 has 2 divisors, whose sum is σ = 72956762. Its totient is φ = 72956760.

The previous prime is 72956731. The next prime is 72956797. The reversal of 72956761 is 16765927.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42981136 + 29975625 = 6556^2 + 5475^2 .

It is a cyclic number.

It is not a de Polignac number, because 72956761 - 2⁵ = 72956729 is a prime.

It is a super-2 number, since 2×72956761² = 10645377951222242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (72956701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36478380 + 36478381.

It is an arithmetic number, because the mean of its divisors is an integer number (36478381).

Almost surely, 2^72956761 is an apocalyptic number.

It is an amenable number.

72956761 is a deficient number, since it is larger than the sum of its proper divisors (1).

72956761 is an equidigital number, since it uses as much as digits as its factorization.

72956761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 158760, while the sum is 43.

The square root of 72956761 is about 8541.4729994305. The cubic root of 72956761 is about 417.8513871548.

The spelling of 72956761 in words is "seventy-two million, nine hundred fifty-six thousand, seven hundred sixty-one".