996857 has 2 divisors, whose sum is σ = 996858. Its totient is φ = 996856.

The previous prime is 996847. The next prime is 996859. The reversal of 996857 is 758699.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 958441 + 38416 = 979^2 + 196^2 .

It is an emirp because it is prime and its reverse (758699) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 996857 - 2⁴ = 996841 is a prime.

Together with 996859, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (996859) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498428 + 498429.

It is an arithmetic number, because the mean of its divisors is an integer number (498429).

2⁹⁹⁶⁸⁵⁷ is an apocalyptic number.

It is an amenable number.

996857 is a deficient number, since it is larger than the sum of its proper divisors (1).

996857 is an equidigital number, since it uses as much as digits as its factorization.

996857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 136080, while the sum is 44.

The square root of 996857 is about 998.4272632496. The cubic root of 996857 is about 99.8951233807.

The spelling of 996857 in words is "nine hundred ninety-six thousand, eight hundred fifty-seven".