290438087 has 2 divisors, whose sum is σ = 290438088. Its totient is φ = 290438086.

The previous prime is 290438077. The next prime is 290438107. The reversal of 290438087 is 780834092.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 290438087 - 2¹² = 290433991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (290438077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145219043 + 145219044.

It is an arithmetic number, because the mean of its divisors is an integer number (145219044).

Almost surely, 2^290438087 is an apocalyptic number.

290438087 is a deficient number, since it is larger than the sum of its proper divisors (1).

290438087 is an equidigital number, since it uses as much as digits as its factorization.

290438087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 290438087 is about 17042.2441890732. The cubic root of 290438087 is about 662.2437310475.

The spelling of 290438087 in words is "two hundred ninety million, four hundred thirty-eight thousand, eighty-seven".