2139188479 has 4 divisors (see below), whose sum is σ = 2139281280. Its totient is φ = 2139095680.

The previous prime is 2139188459. The next prime is 2139188507. The reversal of 2139188479 is 9748819312.

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 not a de Polignac number, because 2139188479 - 2¹¹ = 2139186431 is a prime.

It is a super-2 number, since 2×2139188479² = 9152254697372666882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2139188459) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17634 + ... + 67744.

It is an arithmetic number, because the mean of its divisors is an integer number (534820320).

Almost surely, 2^2139188479 is an apocalyptic number.

2139188479 is a deficient number, since it is larger than the sum of its proper divisors (92801).

2139188479 is an equidigital number, since it uses as much as digits as its factorization.

2139188479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92800.

The product of its digits is 870912, while the sum is 52.

The square root of 2139188479 is about 46251.3619150831. The cubic root of 2139188479 is about 1288.4958288582.

The spelling of 2139188479 in words is "two billion, one hundred thirty-nine million, one hundred eighty-eight thousand, four hundred seventy-nine".