57128017 has 2 divisors, whose sum is σ = 57128018. Its totient is φ = 57128016.

The previous prime is 57127991. The next prime is 57128059. The reversal of 57128017 is 71082175.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43020481 + 14107536 = 6559^2 + 3756^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57128017 is a prime.

It is a super-2 number, since 2×57128017² = 6527220652704578, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 57128017.

It is not a weakly prime, because it can be changed into another prime (57128087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28564008 + 28564009.

It is an arithmetic number, because the mean of its divisors is an integer number (28564009).

Almost surely, 2^57128017 is an apocalyptic number.

It is an amenable number.

57128017 is a deficient number, since it is larger than the sum of its proper divisors (1).

57128017 is an equidigital number, since it uses as much as digits as its factorization.

57128017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3920, while the sum is 31.

The square root of 57128017 is about 7558.3078132608. The cubic root of 57128017 is about 385.1380109025.

The spelling of 57128017 in words is "fifty-seven million, one hundred twenty-eight thousand, seventeen".