990158399 has 2 divisors, whose sum is σ = 990158400. Its totient is φ = 990158398.

The previous prime is 990158363. The next prime is 990158401. The reversal of 990158399 is 993851099.

It is a strong prime.

It is an emirp because it is prime and its reverse (993851099) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 990158399 - 2¹² = 990154303 is a prime.

It is a super-2 number, since 2×990158399² = 1960827310220486402, which contains 22 as substring.

Together with 990158401, it forms a pair of twin primes.

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 990158399.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (990158329) 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, 495079199 + 495079200.

It is an arithmetic number, because the mean of its divisors is an integer number (495079200).

Almost surely, 2^990158399 is an apocalyptic number.

990158399 is a deficient number, since it is larger than the sum of its proper divisors (1).

990158399 is an equidigital number, since it uses as much as digits as its factorization.

990158399 is an odious number, because the sum of its binary digits is odd.

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

The square root of 990158399 is about 31466.7824697728. The cubic root of 990158399 is about 996.7086452020.

The spelling of 990158399 in words is "nine hundred ninety million, one hundred fifty-eight thousand, three hundred ninety-nine".