890399 has 4 divisors (see below), whose sum is σ = 929136. Its totient is φ = 851664.

The previous prime is 890377. The next prime is 890419. The reversal of 890399 is 993098.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 993098 = 2 ⋅496549.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-890399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (890999) 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, 19334 + ... + 19379.

It is an arithmetic number, because the mean of its divisors is an integer number (232284).

2⁸⁹⁰³⁹⁹ is an apocalyptic number.

890399 is a deficient number, since it is larger than the sum of its proper divisors (38737).

890399 is a wasteful number, since it uses less digits than its factorization.

890399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38736.

The product of its (nonzero) digits is 17496, while the sum is 38.

The square root of 890399 is about 943.6095590868. The cubic root of 890399 is about 96.2043894765.

The spelling of 890399 in words is "eight hundred ninety thousand, three hundred ninety-nine".