855342857 has 2 divisors, whose sum is σ = 855342858. Its totient is φ = 855342856.

The previous prime is 855342853. The next prime is 855342899. The reversal of 855342857 is 758243558.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 750157321 + 105185536 = 27389^2 + 10256^2 .

It is a cyclic number.

It is not a de Polignac number, because 855342857 - 2² = 855342853 is a prime.

It is a super-2 number, since 2×855342857² = 1463222806041844898, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (855342853) 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, 427671428 + 427671429.

It is an arithmetic number, because the mean of its divisors is an integer number (427671429).

Almost surely, 2^855342857 is an apocalyptic number.

It is an amenable number.

855342857 is a deficient number, since it is larger than the sum of its proper divisors (1).

855342857 is an equidigital number, since it uses as much as digits as its factorization.

855342857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1344000, while the sum is 47.

The square root of 855342857 is about 29246.2451778002. The cubic root of 855342857 is about 949.2488455623.

The spelling of 855342857 in words is "eight hundred fifty-five million, three hundred forty-two thousand, eight hundred fifty-seven".