979421111 has 4 divisors (see below), whose sum is σ = 979484352. Its totient is φ = 979357872.

The previous prime is 979421039. The next prime is 979421137. The reversal of 979421111 is 111124979.

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 a de Polignac number, because none of the positive numbers 2^k-979421111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (979421141) 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, 9035 + ... + 45171.

It is an arithmetic number, because the mean of its divisors is an integer number (244871088).

It is a Poulet number, since it divides 2^979421110-1.

Almost surely, 2^979421111 is an apocalyptic number.

979421111 is a deficient number, since it is larger than the sum of its proper divisors (63241).

979421111 is a wasteful number, since it uses less digits than its factorization.

979421111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63240.

The product of its digits is 4536, while the sum is 35.

The square root of 979421111 is about 31295.7043537927. The cubic root of 979421111 is about 993.0927703596.

The spelling of 979421111 in words is "nine hundred seventy-nine million, four hundred twenty-one thousand, one hundred eleven".