290090399 has 2 divisors, whose sum is σ = 290090400. Its totient is φ = 290090398.

The previous prime is 290090389. The next prime is 290090401. The reversal of 290090399 is 993090092.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 290090399 - 2¹⁶ = 290024863 is a prime.

Together with 290090401, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (290090389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145045199 + 145045200.

It is an arithmetic number, because the mean of its divisors is an integer number (145045200).

Almost surely, 2^290090399 is an apocalyptic number.

290090399 is a deficient number, since it is larger than the sum of its proper divisors (1).

290090399 is an equidigital number, since it uses as much as digits as its factorization.

290090399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 39366, while the sum is 41.

The square root of 290090399 is about 17032.0403651471. The cubic root of 290090399 is about 661.9793647331.

The spelling of 290090399 in words is "two hundred ninety million, ninety thousand, three hundred ninety-nine".