857963 has 2 divisors, whose sum is σ = 857964. Its totient is φ = 857962.

The previous prime is 857959. The next prime is 857977. The reversal of 857963 is 369758.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 857963 - 2² = 857959 is a prime.

It is a super-2 number, since 2×857963² = 1472201018738, which contains 22 as substring.

It is a Sophie Germain prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 857963.

It is not a weakly prime, because it can be changed into another prime (857903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428981 + 428982.

It is an arithmetic number, because the mean of its divisors is an integer number (428982).

2⁸⁵⁷⁹⁶³ is an apocalyptic number.

857963 is a deficient number, since it is larger than the sum of its proper divisors (1).

857963 is an equidigital number, since it uses as much as digits as its factorization.

857963 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45360, while the sum is 38.

The square root of 857963 is about 926.2629216373. The cubic root of 857963 is about 95.0217124887.

The spelling of 857963 in words is "eight hundred fifty-seven thousand, nine hundred sixty-three".