290238899 has 2 divisors, whose sum is σ = 290238900. Its totient is φ = 290238898.

The previous prime is 290238869. The next prime is 290238901. The reversal of 290238899 is 998832092.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 290238899 - 2⁸ = 290238643 is a prime.

Together with 290238901, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (290238829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145119449 + 145119450.

It is an arithmetic number, because the mean of its divisors is an integer number (145119450).

Almost surely, 2^290238899 is an apocalyptic number.

290238899 is a deficient number, since it is larger than the sum of its proper divisors (1).

290238899 is an equidigital number, since it uses as much as digits as its factorization.

290238899 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 559872, while the sum is 50.

The square root of 290238899 is about 17036.3992381019. The cubic root of 290238899 is about 662.0923032821.

The spelling of 290238899 in words is "two hundred ninety million, two hundred thirty-eight thousand, eight hundred ninety-nine".