857601113 has 2 divisors, whose sum is σ = 857601114. Its totient is φ = 857601112.

The previous prime is 857601089. The next prime is 857601149. The reversal of 857601113 is 311106758.

857601113 = 20707² + 20708².

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 428821264 + 428779849 = 20708^2 + 20707^2 .

It is a cyclic number.

It is not a de Polignac number, because 857601113 - 2⁸ = 857600857 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is equal to p_43951334 and since 857601113 and 43951334 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 857601113.

It is not a weakly prime, because it can be changed into another prime (857601413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428800556 + 428800557.

It is an arithmetic number, because the mean of its divisors is an integer number (428800557).

Almost surely, 2^857601113 is an apocalyptic number.

857601113 is the 20708-th centered square number.

It is an amenable number.

857601113 is a deficient number, since it is larger than the sum of its proper divisors (1).

857601113 is an equidigital number, since it uses as much as digits as its factorization.

857601113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 857601113 is about 29284.8273513777. The cubic root of 857601113 is about 950.0835062329.

The spelling of 857601113 in words is "eight hundred fifty-seven million, six hundred one thousand, one hundred thirteen".