990366779 has 4 divisors (see below), whose sum is σ = 990446184. Its totient is φ = 990287376.

The previous prime is 990366763. The next prime is 990366803. The reversal of 990366779 is 977663099.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 990366779 - 2⁴ = 990366763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (990366709) 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 in 3 ways as a sum of consecutive naturals, for example, 16457 + ... + 47450.

It is an arithmetic number, because the mean of its divisors is an integer number (247611546).

Almost surely, 2^990366779 is an apocalyptic number.

990366779 is a deficient number, since it is larger than the sum of its proper divisors (79405).

990366779 is a wasteful number, since it uses less digits than its factorization.

990366779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79404.

The product of its (nonzero) digits is 3857868, while the sum is 56.

The square root of 990366779 is about 31470.0934062802. The cubic root of 990366779 is about 996.7785598001.

The spelling of 990366779 in words is "nine hundred ninety million, three hundred sixty-six thousand, seven hundred seventy-nine".