290928887 has 2 divisors, whose sum is σ = 290928888. Its totient is φ = 290928886.

The previous prime is 290928881. The next prime is 290928889. The reversal of 290928887 is 788829092.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 290928887 - 2¹⁰ = 290927863 is a prime.

Together with 290928889, 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 (290928881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145464443 + 145464444.

It is an arithmetic number, because the mean of its divisors is an integer number (145464444).

Almost surely, 2^290928887 is an apocalyptic number.

290928887 is a deficient number, since it is larger than the sum of its proper divisors (1).

290928887 is an equidigital number, since it uses as much as digits as its factorization.

290928887 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1161216, while the sum is 53.

The square root of 290928887 is about 17056.6376229314. The cubic root of 290928887 is about 662.6165544072.

The spelling of 290928887 in words is "two hundred ninety million, nine hundred twenty-eight thousand, eight hundred eighty-seven".