2081978279 has 8 divisors (see below), whose sum is σ = 2098911360. Its totient is φ = 2065073400.

The previous prime is 2081978273. The next prime is 2081978309. The reversal of 2081978279 is 9728791802.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2081978279 - 2⁴ = 2081978263 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 2081978279.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2081978273) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156374 + ... + 169164.

It is an arithmetic number, because the mean of its divisors is an integer number (262363920).

Almost surely, 2^2081978279 is an apocalyptic number.

2081978279 is a deficient number, since it is larger than the sum of its proper divisors (16933081).

2081978279 is a wasteful number, since it uses less digits than its factorization.

2081978279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14101.

The product of its (nonzero) digits is 1016064, while the sum is 53.

The square root of 2081978279 is about 45628.7001677672. The cubic root of 2081978279 is about 1276.9054230211.

The spelling of 2081978279 in words is "two billion, eighty-one million, nine hundred seventy-eight thousand, two hundred seventy-nine".