63857 has 2 divisors, whose sum is σ = 63858. Its totient is φ = 63856.

The previous prime is 63853. The next prime is 63863. The reversal of 63857 is 75836.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58081 + 5776 = 241^2 + 76^2 .

It is a cyclic number.

It is not a de Polignac number, because 63857 - 2² = 63853 is a prime.

It is a Chen prime.

It is a nialpdrome in base 16.

It is not a weakly prime, because it can be changed into another prime (63853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31928 + 31929.

It is an arithmetic number, because the mean of its divisors is an integer number (31929).

2⁶³⁸⁵⁷ is an apocalyptic number.

It is an amenable number.

63857 is a deficient number, since it is larger than the sum of its proper divisors (1).

63857 is an equidigital number, since it uses as much as digits as its factorization.

63857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5040, while the sum is 29.

The square root of 63857 is about 252.6994261964. The cubic root of 63857 is about 39.9701861172.

The spelling of 63857 in words is "sixty-three thousand, eight hundred fifty-seven".