990839159 has 2 divisors, whose sum is σ = 990839160. Its totient is φ = 990839158.

The previous prime is 990839137. The next prime is 990839177. The reversal of 990839159 is 951938099.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 990839159 - 2⁸ = 990838903 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 990839159.

It is a congruent number.

It is a weakly prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495419579 + 495419580.

It is an arithmetic number, because the mean of its divisors is an integer number (495419580).

Almost surely, 2^990839159 is an apocalyptic number.

990839159 is a deficient number, since it is larger than the sum of its proper divisors (1).

990839159 is an equidigital number, since it uses as much as digits as its factorization.

990839159 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 787320, while the sum is 53.

The square root of 990839159 is about 31477.5977323556. The cubic root of 990839159 is about 996.9370140291.

The spelling of 990839159 in words is "nine hundred ninety million, eight hundred thirty-nine thousand, one hundred fifty-nine".