872428057 has 2 divisors, whose sum is σ = 872428058. Its totient is φ = 872428056.

The previous prime is 872428021. The next prime is 872428091. The reversal of 872428057 is 750824278.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 748350736 + 124077321 = 27356^2 + 11139^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-872428057 is a prime.

It is a super-2 number, since 2×872428057² = 1522261429281590498, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (872428097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 436214028 + 436214029.

It is an arithmetic number, because the mean of its divisors is an integer number (436214029).

Almost surely, 2^872428057 is an apocalyptic number.

It is an amenable number.

872428057 is a deficient number, since it is larger than the sum of its proper divisors (1).

872428057 is an equidigital number, since it uses as much as digits as its factorization.

872428057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 250880, while the sum is 43.

The square root of 872428057 is about 29536.8931507699. The cubic root of 872428057 is about 955.5275383654.

The spelling of 872428057 in words is "eight hundred seventy-two million, four hundred twenty-eight thousand, fifty-seven".