290863 has 4 divisors (see below), whose sum is σ = 292320. Its totient is φ = 289408.

The previous prime is 290861. The next prime is 290869. The reversal of 290863 is 368092.

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 290863 - 2¹ = 290861 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a zygodrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (290861) 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, 370 + ... + 847.

It is an arithmetic number, because the mean of its divisors is an integer number (73080).

2²⁹⁰⁸⁶³ is an apocalyptic number.

290863 is a deficient number, since it is larger than the sum of its proper divisors (1457).

290863 is a wasteful number, since it uses less digits than its factorization.

290863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1456.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 290863 is about 539.3171608618. The cubic root of 290863 is about 66.2566529453.

The spelling of 290863 in words is "two hundred ninety thousand, eight hundred sixty-three".