2649769139 has 4 divisors (see below), whose sum is σ = 2650058160. Its totient is φ = 2649480120.

The previous prime is 2649769043. The next prime is 2649769151. The reversal of 2649769139 is 9319679462.

2649769139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2649769139 - 2¹² = 2649765043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2649769189) 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, 130292 + ... + 149249.

It is an arithmetic number, because the mean of its divisors is an integer number (662514540).

Almost surely, 2^2649769139 is an apocalyptic number.

2649769139 is a deficient number, since it is larger than the sum of its proper divisors (289021).

2649769139 is an equidigital number, since it uses as much as digits as its factorization.

2649769139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289020.

The product of its digits is 4408992, while the sum is 56.

The square root of 2649769139 is about 51475.9083358419. The cubic root of 2649769139 is about 1383.7873173452.

The spelling of 2649769139 in words is "two billion, six hundred forty-nine million, seven hundred sixty-nine thousand, one hundred thirty-nine".