290923 has 2 divisors, whose sum is σ = 290924. Its totient is φ = 290922.

The previous prime is 290897. The next prime is 290959. The reversal of 290923 is 329092.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-290923 is a prime.

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

290923 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (290963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145461 + 145462.

It is an arithmetic number, because the mean of its divisors is an integer number (145462).

2²⁹⁰⁹²³ is an apocalyptic number.

290923 is a deficient number, since it is larger than the sum of its proper divisors (1).

290923 is an equidigital number, since it uses as much as digits as its factorization.

290923 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 290923 is about 539.3727838888. The cubic root of 290923 is about 66.2612084987.

The spelling of 290923 in words is "two hundred ninety thousand, nine hundred twenty-three".