3118172857 has 2 divisors, whose sum is σ = 3118172858. Its totient is φ = 3118172856.

The previous prime is 3118172839. The next prime is 3118172867. The reversal of 3118172857 is 7582718113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2860538256 + 257634601 = 53484^2 + 16051^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3118172857 is a prime.

It is a super-2 number, since 2×3118172857² = 19446003932263084898, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3118172867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1559086428 + 1559086429.

It is an arithmetic number, because the mean of its divisors is an integer number (1559086429).

Almost surely, 2^3118172857 is an apocalyptic number.

It is an amenable number.

3118172857 is a deficient number, since it is larger than the sum of its proper divisors (1).

3118172857 is an equidigital number, since it uses as much as digits as its factorization.

3118172857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 94080, while the sum is 43.

The square root of 3118172857 is about 55840.6022263371. The cubic root of 3118172857 is about 1460.9434161836.

The spelling of 3118172857 in words is "three billion, one hundred eighteen million, one hundred seventy-two thousand, eight hundred fifty-seven".