72797957 has 2 divisors, whose sum is σ = 72797958. Its totient is φ = 72797956.

The previous prime is 72797909. The next prime is 72797969. The reversal of 72797957 is 75979727.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67387681 + 5410276 = 8209^2 + 2326^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72797957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72797899 and 72797908.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72797057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36398978 + 36398979.

It is an arithmetic number, because the mean of its divisors is an integer number (36398979).

Almost surely, 2^72797957 is an apocalyptic number.

It is an amenable number.

72797957 is a deficient number, since it is larger than the sum of its proper divisors (1).

72797957 is an equidigital number, since it uses as much as digits as its factorization.

72797957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1944810, while the sum is 53.

The square root of 72797957 is about 8532.1718805941. The cubic root of 72797957 is about 417.5479897505.

The spelling of 72797957 in words is "seventy-two million, seven hundred ninety-seven thousand, nine hundred fifty-seven".