2102061779 has 6 divisors (see below), whose sum is σ = 2142474516. Its totient is φ = 2062397480.

The previous prime is 2102061757. The next prime is 2102061799. The reversal of 2102061779 is 9771602012.

It is not a de Polignac number, because 2102061779 - 2²⁰ = 2101013203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2102061749) 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 5 ways as a sum of consecutive naturals, for example, 371357 + ... + 376974.

It is an arithmetic number, because the mean of its divisors is an integer number (357079086).

Almost surely, 2^2102061779 is an apocalyptic number.

2102061779 is a deficient number, since it is larger than the sum of its proper divisors (40412737).

2102061779 is an frugal number, since it uses more digits than its factorization.

2102061779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 748437 (or 748384 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 35.

The square root of 2102061779 is about 45848.2472838385. The cubic root of 2102061779 is about 1280.9981185794.

The spelling of 2102061779 in words is "two billion, one hundred two million, sixty-one thousand, seven hundred seventy-nine".