72700961 has 2 divisors, whose sum is σ = 72700962. Its totient is φ = 72700960.

The previous prime is 72700951. The next prime is 72700981. The reversal of 72700961 is 16900727.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65302561 + 7398400 = 8081^2 + 2720^2 .

It is a cyclic number.

It is not a de Polignac number, because 72700961 - 2¹⁰ = 72699937 is a prime.

It is not a weakly prime, because it can be changed into another prime (72700951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36350480 + 36350481.

It is an arithmetic number, because the mean of its divisors is an integer number (36350481).

Almost surely, 2^72700961 is an apocalyptic number.

It is an amenable number.

72700961 is a deficient number, since it is larger than the sum of its proper divisors (1).

72700961 is an equidigital number, since it uses as much as digits as its factorization.

72700961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5292, while the sum is 32.

The square root of 72700961 is about 8526.4858529174. The cubic root of 72700961 is about 417.3624603418.

The spelling of 72700961 in words is "seventy-two million, seven hundred thousand, nine hundred sixty-one".