290243 has 2 divisors, whose sum is σ = 290244. Its totient is φ = 290242.

The previous prime is 290233. The next prime is 290249. The reversal of 290243 is 342092.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 290243 - 2⁸ = 289987 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is equal to p₂₅₂₄₇ and since 290243 and 25247 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (290249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145121 + 145122.

It is an arithmetic number, because the mean of its divisors is an integer number (145122).

2²⁹⁰²⁴³ is an apocalyptic number.

290243 is a deficient number, since it is larger than the sum of its proper divisors (1).

290243 is an equidigital number, since it uses as much as digits as its factorization.

290243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 290243 is about 538.7420533057. The cubic root of 290243 is about 66.2095421665.

The spelling of 290243 in words is "two hundred ninety thousand, two hundred forty-three".