990422947 has 2 divisors, whose sum is σ = 990422948. Its totient is φ = 990422946.

The previous prime is 990422929. The next prime is 990422957. The reversal of 990422947 is 749224099.

990422947 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-990422947 is a prime.

It is a super-2 number, since 2×990422947² = 1961875227888329618, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 990422897 and 990422906.

It is not a weakly prime, because it can be changed into another prime (990422957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495211473 + 495211474.

It is an arithmetic number, because the mean of its divisors is an integer number (495211474).

Almost surely, 2^990422947 is an apocalyptic number.

990422947 is a deficient number, since it is larger than the sum of its proper divisors (1).

990422947 is an equidigital number, since it uses as much as digits as its factorization.

990422947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 326592, while the sum is 46.

The square root of 990422947 is about 31470.9857964443. The cubic root of 990422947 is about 996.7974033238.

The spelling of 990422947 in words is "nine hundred ninety million, four hundred twenty-two thousand, nine hundred forty-seven".