979926691 has 16 divisors (see below), whose sum is σ = 1060899840. Its totient is φ = 902076480.

The previous prime is 979926683. The next prime is 979926697. The reversal of 979926691 is 196629979.

It is a cyclic number.

It is not a de Polignac number, because 979926691 - 2³ = 979926683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (979926697) 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, 202486 + ... + 207268.

It is an arithmetic number, because the mean of its divisors is an integer number (66306240).

Almost surely, 2^979926691 is an apocalyptic number.

979926691 is a deficient number, since it is larger than the sum of its proper divisors (80973149).

979926691 is a wasteful number, since it uses less digits than its factorization.

979926691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5106.

The product of its digits is 3306744, while the sum is 58.

The square root of 979926691 is about 31303.7807780466. The cubic root of 979926691 is about 993.2636200819.

The spelling of 979926691 in words is "nine hundred seventy-nine million, nine hundred twenty-six thousand, six hundred ninety-one".