986857 has 2 divisors, whose sum is σ = 986858. Its totient is φ = 986856.

The previous prime is 986851. The next prime is 986903. The reversal of 986857 is 758689.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 802816 + 184041 = 896^2 + 429^2 .

It is a cyclic number.

It is not a de Polignac number, because 986857 - 2³ = 986849 is a prime.

It is not a weakly prime, because it can be changed into another prime (986851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 493428 + 493429.

It is an arithmetic number, because the mean of its divisors is an integer number (493429).

2⁹⁸⁶⁸⁵⁷ is an apocalyptic number.

It is an amenable number.

986857 is a deficient number, since it is larger than the sum of its proper divisors (1).

986857 is an equidigital number, since it uses as much as digits as its factorization.

986857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 43.

The square root of 986857 is about 993.4067646236. The cubic root of 986857 is about 99.5599665457.

The spelling of 986857 in words is "nine hundred eighty-six thousand, eight hundred fifty-seven".