980857 has 4 divisors (see below), whose sum is σ = 984676. Its totient is φ = 977040.

The previous prime is 980851. The next prime is 980887. The reversal of 980857 is 758089.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 758089 = 29 ⋅26141.

It can be written as a sum of positive squares in 2 ways, for example, as 281961 + 698896 = 531^2 + 836^2 .

It is a cyclic number.

It is not a de Polignac number, because 980857 - 2⁷ = 980729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (980851) 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, 1494 + ... + 2047.

It is an arithmetic number, because the mean of its divisors is an integer number (246169).

2⁹⁸⁰⁸⁵⁷ is an apocalyptic number.

It is an amenable number.

980857 is a deficient number, since it is larger than the sum of its proper divisors (3819).

980857 is a wasteful number, since it uses less digits than its factorization.

980857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3818.

The product of its (nonzero) digits is 20160, while the sum is 37.

The square root of 980857 is about 990.3822494371. The cubic root of 980857 is about 99.3577844207.

The spelling of 980857 in words is "nine hundred eighty thousand, eight hundred fifty-seven".