2091982679 has 4 divisors (see below), whose sum is σ = 2092125840. Its totient is φ = 2091839520.

The previous prime is 2091982667. The next prime is 2091982691. The reversal of 2091982679 is 9762891902.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (2091982667) and next prime (2091982691).

It is a cyclic number.

It is not a de Polignac number, because 2091982679 - 2¹² = 2091978583 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2091982679.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2091982619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46802 + ... + 79839.

It is an arithmetic number, because the mean of its divisors is an integer number (523031460).

Almost surely, 2^2091982679 is an apocalyptic number.

2091982679 is a deficient number, since it is larger than the sum of its proper divisors (143161).

2091982679 is a wasteful number, since it uses less digits than its factorization.

2091982679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143160.

The product of its (nonzero) digits is 979776, while the sum is 53.

The square root of 2091982679 is about 45738.1971551131. The cubic root of 2091982679 is about 1278.9474336437.

The spelling of 2091982679 in words is "two billion, ninety-one million, nine hundred eighty-two thousand, six hundred seventy-nine".