2857392257 has 2 divisors, whose sum is σ = 2857392258. Its totient is φ = 2857392256.

The previous prime is 2857392169. The next prime is 2857392287. The reversal of 2857392257 is 7522937582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2770548496 + 86843761 = 52636^2 + 9319^2 .

It is a cyclic number.

It is not a de Polignac number, because 2857392257 - 2¹⁶ = 2857326721 is a prime.

It is not a weakly prime, because it can be changed into another prime (2857392287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1428696128 + 1428696129.

It is an arithmetic number, because the mean of its divisors is an integer number (1428696129).

Almost surely, 2^2857392257 is an apocalyptic number.

It is an amenable number.

2857392257 is a deficient number, since it is larger than the sum of its proper divisors (1).

2857392257 is an equidigital number, since it uses as much as digits as its factorization.

2857392257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2116800, while the sum is 50.

The square root of 2857392257 is about 53454.5812536213. The cubic root of 2857392257 is about 1419.0246984328.

The spelling of 2857392257 in words is "two billion, eight hundred fifty-seven million, three hundred ninety-two thousand, two hundred fifty-seven".