990942923 has 2 divisors, whose sum is σ = 990942924. Its totient is φ = 990942922.

The previous prime is 990942919. The next prime is 990942941. The reversal of 990942923 is 329249099.

990942923 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 990942923 - 2² = 990942919 is a prime.

It is not a weakly prime, because it can be changed into another prime (990962923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495471461 + 495471462.

It is an arithmetic number, because the mean of its divisors is an integer number (495471462).

Almost surely, 2^990942923 is an apocalyptic number.

990942923 is a deficient number, since it is larger than the sum of its proper divisors (1).

990942923 is an equidigital number, since it uses as much as digits as its factorization.

990942923 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 314928, while the sum is 47.

The square root of 990942923 is about 31479.2459090112. The cubic root of 990942923 is about 996.9718136770.

The spelling of 990942923 in words is "nine hundred ninety million, nine hundred forty-two thousand, nine hundred twenty-three".