890839 has 4 divisors (see below), whose sum is σ = 901656. Its totient is φ = 880024.

The previous prime is 890833. The next prime is 890843. The reversal of 890839 is 938098.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 890839 - 2⁷ = 890711 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 890798 and 890807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (890833) 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, 5284 + ... + 5449.

It is an arithmetic number, because the mean of its divisors is an integer number (225414).

2⁸⁹⁰⁸³⁹ is an apocalyptic number.

890839 is a deficient number, since it is larger than the sum of its proper divisors (10817).

890839 is a wasteful number, since it uses less digits than its factorization.

890839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10816.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 890839 is about 943.8426775687. The cubic root of 890839 is about 96.2202336694.

The spelling of 890839 in words is "eight hundred ninety thousand, eight hundred thirty-nine".