983857 has 4 divisors (see below), whose sum is σ = 1124416. Its totient is φ = 843300.

The previous prime is 983849. The next prime is 983861. The reversal of 983857 is 758389.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 983857 - 2³ = 983849 is a prime.

It is a Duffinian number.

983857 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (983557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70269 + ... + 70282.

It is an arithmetic number, because the mean of its divisors is an integer number (281104).

2⁹⁸³⁸⁵⁷ is an apocalyptic number.

It is an amenable number.

983857 is a deficient number, since it is larger than the sum of its proper divisors (140559).

983857 is a wasteful number, since it uses less digits than its factorization.

983857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140558.

The product of its digits is 60480, while the sum is 40.

The square root of 983857 is about 991.8956598352. The cubic root of 983857 is about 99.4589782331.

The spelling of 983857 in words is "nine hundred eighty-three thousand, eight hundred fifty-seven".