290323 has 4 divisors (see below), whose sum is σ = 316728. Its totient is φ = 263920.

The previous prime is 290317. The next prime is 290327. The reversal of 290323 is 323092.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-290323 is a prime.

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

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 290323.

It is not an unprimeable number, because it can be changed into a prime (290327) 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, 13186 + ... + 13207.

It is an arithmetic number, because the mean of its divisors is an integer number (79182).

2²⁹⁰³²³ is an apocalyptic number.

290323 is a deficient number, since it is larger than the sum of its proper divisors (26405).

290323 is a wasteful number, since it uses less digits than its factorization.

290323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26404.

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 290323 is about 538.8162952250. The cubic root of 290323 is about 66.2156247442.

It can be divided in two parts, 2903 and 23, that added together give a triangular number (2926 = T₇₆).

The spelling of 290323 in words is "two hundred ninety thousand, three hundred twenty-three".