979999911 has 32 divisors (see below), whose sum is σ = 1586327040. Its totient is φ = 593006400.

The previous prime is 979999907. The next prime is 979999913. The reversal of 979999911 is 119999979.

It is not a de Polignac number, because 979999911 - 2² = 979999907 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (979999913) 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 31 ways as a sum of consecutive naturals, for example, 218451 + ... + 222891.

It is an arithmetic number, because the mean of its divisors is an integer number (49572720).

Almost surely, 2^979999911 is an apocalyptic number.

979999911 is a deficient number, since it is larger than the sum of its proper divisors (606327129).

979999911 is a wasteful number, since it uses less digits than its factorization.

979999911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5204 (or 5198 counting only the distinct ones).

The product of its digits is 3720087, while the sum is 63.

The square root of 979999911 is about 31304.9502634967. The cubic root of 979999911 is about 993.2883583103.

The spelling of 979999911 in words is "nine hundred seventy-nine million, nine hundred ninety-nine thousand, nine hundred eleven".