847425857 has 2 divisors, whose sum is σ = 847425858. Its totient is φ = 847425856.

The previous prime is 847425833. The next prime is 847425881. The reversal of 847425857 is 758524748.

It is a balanced prime because it is at equal distance from previous prime (847425833) and next prime (847425881).

It can be written as a sum of positive squares in only one way, i.e., 778186816 + 69239041 = 27896^2 + 8321^2 .

It is a cyclic number.

It is not a de Polignac number, because 847425857 - 2²⁰ = 846377281 is a prime.

It is a super-2 number, since 2×847425857² = 1436261166224368898, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (847425457) 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, 423712928 + 423712929.

It is an arithmetic number, because the mean of its divisors is an integer number (423712929).

Almost surely, 2^847425857 is an apocalyptic number.

It is an amenable number.

847425857 is a deficient number, since it is larger than the sum of its proper divisors (1).

847425857 is an equidigital number, since it uses as much as digits as its factorization.

847425857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2508800, while the sum is 50.

The square root of 847425857 is about 29110.5798121576. The cubic root of 847425857 is about 946.3110334440.

The spelling of 847425857 in words is "eight hundred forty-seven million, four hundred twenty-five thousand, eight hundred fifty-seven".