290189899 has 2 divisors, whose sum is σ = 290189900. Its totient is φ = 290189898.

The previous prime is 290189849. The next prime is 290189917. The reversal of 290189899 is 998981092.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 290189899 - 2¹³ = 290181707 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (290189849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145094949 + 145094950.

It is an arithmetic number, because the mean of its divisors is an integer number (145094950).

Almost surely, 2^290189899 is an apocalyptic number.

290189899 is a deficient number, since it is larger than the sum of its proper divisors (1).

290189899 is an equidigital number, since it uses as much as digits as its factorization.

290189899 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 839808, while the sum is 55.

The square root of 290189899 is about 17034.9610800847. The cubic root of 290189899 is about 662.0550416230.

The spelling of 290189899 in words is "two hundred ninety million, one hundred eighty-nine thousand, eight hundred ninety-nine".