999469779 has 16 divisors (see below), whose sum is σ = 1661456640. Its totient is φ = 519204960.

The previous prime is 999469777. The next prime is 999469819. The reversal of 999469779 is 977964999.

It is not a de Polignac number, because 999469779 - 2¹ = 999469777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (999469771) 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 15 ways as a sum of consecutive naturals, for example, 2163124 + ... + 2163585.

It is an arithmetic number, because the mean of its divisors is an integer number (103841040).

Almost surely, 2^999469779 is an apocalyptic number.

999469779 is a deficient number, since it is larger than the sum of its proper divisors (661986861).

999469779 is a wasteful number, since it uses less digits than its factorization.

999469779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4326730.

The product of its digits is 69441624, while the sum is 69.

The square root of 999469779 is about 31614.3919599919. The cubic root of 999469779 is about 999.8232284203.

The spelling of 999469779 in words is "nine hundred ninety-nine million, four hundred sixty-nine thousand, seven hundred seventy-nine".