290533 has 2 divisors, whose sum is σ = 290534. Its totient is φ = 290532.

The previous prime is 290531. The next prime is 290539. The reversal of 290533 is 335092.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 289444 + 1089 = 538^2 + 33^2 .

It is a cyclic number.

It is not a de Polignac number, because 290533 - 2¹ = 290531 is a prime.

Together with 290531, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (290531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145266 + 145267.

It is an arithmetic number, because the mean of its divisors is an integer number (145267).

2²⁹⁰⁵³³ is an apocalyptic number.

It is an amenable number.

290533 is a deficient number, since it is larger than the sum of its proper divisors (1).

290533 is an equidigital number, since it uses as much as digits as its factorization.

290533 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 810, while the sum is 22.

The square root of 290533 is about 539.0111316105. The cubic root of 290533 is about 66.2315861961.

The spelling of 290533 in words is "two hundred ninety thousand, five hundred thirty-three".