390563 has 4 divisors (see below), whose sum is σ = 407568. Its totient is φ = 373560.

The previous prime is 390553. The next prime is 390581. The reversal of 390563 is 365093.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 365093 = 331 ⋅1103.

It is a cyclic number.

It is not a de Polignac number, because 390563 - 2⁶ = 390499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (390503) 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, 8468 + ... + 8513.

It is an arithmetic number, because the mean of its divisors is an integer number (101892).

2³⁹⁰⁵⁶³ is an apocalyptic number.

390563 is a deficient number, since it is larger than the sum of its proper divisors (17005).

390563 is a wasteful number, since it uses less digits than its factorization.

390563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17004.

The product of its (nonzero) digits is 2430, while the sum is 26.

The square root of 390563 is about 624.9503980317. The cubic root of 390563 is about 73.0965757499.

The spelling of 390563 in words is "three hundred ninety thousand, five hundred sixty-three".