290399 has 2 divisors, whose sum is σ = 290400. Its totient is φ = 290398.

The previous prime is 290393. The next prime is 290419. The reversal of 290399 is 993092.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 290399 - 2⁴ = 290383 is a prime.

It is a Chen prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 290399.

It is not a weakly prime, because it can be changed into another prime (290393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145199 + 145200.

It is an arithmetic number, because the mean of its divisors is an integer number (145200).

2²⁹⁰³⁹⁹ is an apocalyptic number.

290399 is a deficient number, since it is larger than the sum of its proper divisors (1).

290399 is an equidigital number, since it uses as much as digits as its factorization.

290399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4374, while the sum is 32.

The square root of 290399 is about 538.8868155745. The cubic root of 290399 is about 66.2214021581.

The spelling of 290399 in words is "two hundred ninety thousand, three hundred ninety-nine".