390023 has 4 divisors (see below), whose sum is σ = 395040. Its totient is φ = 385008.

The previous prime is 390001. The next prime is 390043. The reversal of 390023 is 320093.

It is a happy number.

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 390023 - 2¹² = 385927 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 389983 and 390010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390043) 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, 2390 + ... + 2547.

It is an arithmetic number, because the mean of its divisors is an integer number (98760).

2³⁹⁰⁰²³ is an apocalyptic number.

390023 is a deficient number, since it is larger than the sum of its proper divisors (5017).

390023 is an equidigital number, since it uses as much as digits as its factorization.

390023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5016.

The product of its (nonzero) digits is 162, while the sum is 17.

The square root of 390023 is about 624.5182143060. The cubic root of 390023 is about 73.0628719628.

The spelling of 390023 in words is "three hundred ninety thousand, twenty-three".