2139787579 has 4 divisors (see below), whose sum is σ = 2149214184. Its totient is φ = 2130360976.

The previous prime is 2139787577. The next prime is 2139787583. The reversal of 2139787579 is 9757879312.

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

It is a cyclic number.

It is not a de Polignac number, because 2139787579 - 2¹ = 2139787577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2139787577) 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, 4712962 + ... + 4713415.

It is an arithmetic number, because the mean of its divisors is an integer number (537303546).

Almost surely, 2^2139787579 is an apocalyptic number.

2139787579 is a deficient number, since it is larger than the sum of its proper divisors (9426605).

2139787579 is an equidigital number, since it uses as much as digits as its factorization.

2139787579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9426604.

The product of its digits is 6667920, while the sum is 58.

The square root of 2139787579 is about 46257.8380277332. The cubic root of 2139787579 is about 1288.6161027856.

The spelling of 2139787579 in words is "two billion, one hundred thirty-nine million, seven hundred eighty-seven thousand, five hundred seventy-nine".