72880057 has 2 divisors, whose sum is σ = 72880058. Its totient is φ = 72880056.

The previous prime is 72879979. The next prime is 72880079. The reversal of 72880057 is 75008827.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69405561 + 3474496 = 8331^2 + 1864^2 .

It is a cyclic number.

It is not a de Polignac number, because 72880057 - 2¹¹ = 72878009 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72879998 and 72880025.

It is not a weakly prime, because it can be changed into another prime (72880957) 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, 36440028 + 36440029.

It is an arithmetic number, because the mean of its divisors is an integer number (36440029).

Almost surely, 2^72880057 is an apocalyptic number.

It is an amenable number.

72880057 is a deficient number, since it is larger than the sum of its proper divisors (1).

72880057 is an equidigital number, since it uses as much as digits as its factorization.

72880057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31360, while the sum is 37.

The square root of 72880057 is about 8536.9817265823. The cubic root of 72880057 is about 417.7048980505.

The spelling of 72880057 in words is "seventy-two million, eight hundred eighty thousand, fifty-seven".