290563 has 16 divisors (see below), whose sum is σ = 372736. Its totient is φ = 220320.

The previous prime is 290557. The next prime is 290593. The reversal of 290563 is 365092.

It is a cyclic number.

It is not a de Polignac number, because 290563 - 2⁵ = 290531 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (290533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2770 + ... + 2872.

It is an arithmetic number, because the mean of its divisors is an integer number (23296).

2²⁹⁰⁵⁶³ is an apocalyptic number.

290563 is a deficient number, since it is larger than the sum of its proper divisors (82173).

290563 is a wasteful number, since it uses less digits than its factorization.

290563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154.

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 290563 is about 539.0389596309. The cubic root of 290563 is about 66.2338657756.

Subtracting 290563 from its reverse (365092), we obtain a square (74529 = 273²).

The spelling of 290563 in words is "two hundred ninety thousand, five hundred sixty-three".