990766979 has 2 divisors, whose sum is σ = 990766980. Its totient is φ = 990766978.

The previous prime is 990766967. The next prime is 990767047. The reversal of 990766979 is 979667099.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 990766979 - 2⁴ = 990766963 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (990766939) 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, 495383489 + 495383490.

It is an arithmetic number, because the mean of its divisors is an integer number (495383490).

Almost surely, 2^990766979 is an apocalyptic number.

990766979 is a deficient number, since it is larger than the sum of its proper divisors (1).

990766979 is an equidigital number, since it uses as much as digits as its factorization.

990766979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11573604, while the sum is 62.

The square root of 990766979 is about 31476.4511817962. The cubic root of 990766979 is about 996.9128053704.

The spelling of 990766979 in words is "nine hundred ninety million, seven hundred sixty-six thousand, nine hundred seventy-nine".