72956977 has 2 divisors, whose sum is σ = 72956978. Its totient is φ = 72956976.

The previous prime is 72956963. The next prime is 72956993. The reversal of 72956977 is 77965927.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37957921 + 34999056 = 6161^2 + 5916^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72956977 is a prime.

It is not a weakly prime, because it can be changed into another prime (72956927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36478488 + 36478489.

It is an arithmetic number, because the mean of its divisors is an integer number (36478489).

Almost surely, 2^72956977 is an apocalyptic number.

It is an amenable number.

72956977 is a deficient number, since it is larger than the sum of its proper divisors (1).

72956977 is an equidigital number, since it uses as much as digits as its factorization.

72956977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1666980, while the sum is 52.

The square root of 72956977 is about 8541.4856436102. The cubic root of 72956977 is about 417.8517995261.

The spelling of 72956977 in words is "seventy-two million, nine hundred fifty-six thousand, nine hundred seventy-seven".