2139968579 has 4 divisors (see below), whose sum is σ = 2445678384. Its totient is φ = 1834258776.

The previous prime is 2139968569. The next prime is 2139968581. The reversal of 2139968579 is 9758699312.

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

It is not a de Polignac number, because 2139968579 - 2¹⁶ = 2139903043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2139968569) 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 3 ways as a sum of consecutive naturals, for example, 152854892 + ... + 152854905.

It is an arithmetic number, because the mean of its divisors is an integer number (611419596).

Almost surely, 2^2139968579 is an apocalyptic number.

2139968579 is a deficient number, since it is larger than the sum of its proper divisors (305709805).

2139968579 is an equidigital number, since it uses as much as digits as its factorization.

2139968579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305709804.

The product of its digits is 7348320, while the sum is 59.

The square root of 2139968579 is about 46259.7944115622. The cubic root of 2139968579 is about 1288.6524355102.

The spelling of 2139968579 in words is "two billion, one hundred thirty-nine million, nine hundred sixty-eight thousand, five hundred seventy-nine".