890423 has 4 divisors (see below), whose sum is σ = 892320. Its totient is φ = 888528.

The previous prime is 890419. The next prime is 890429. The reversal of 890423 is 324098.

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 890423 - 2² = 890419 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 890392 and 890401.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 890423.

It is not an unprimeable number, because it can be changed into a prime (890429) 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, 338 + ... + 1376.

It is an arithmetic number, because the mean of its divisors is an integer number (223080).

2⁸⁹⁰⁴²³ is an apocalyptic number.

890423 is a deficient number, since it is larger than the sum of its proper divisors (1897).

890423 is a wasteful number, since it uses less digits than its factorization.

890423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1896.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 890423 is about 943.6222761254. The cubic root of 890423 is about 96.2052538397.

The spelling of 890423 in words is "eight hundred ninety thousand, four hundred twenty-three".