2139764049 has 24 divisors (see below), whose sum is σ = 3113633952. Its totient is φ = 1415998080.

The previous prime is 2139764027. The next prime is 2139764051. The reversal of 2139764049 is 9404679312.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-2139764049 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2139763995 and 2139764013.

It is not an unprimeable number, because it can be changed into a prime (2139764009) 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 23 ways as a sum of consecutive naturals, for example, 751222 + ... + 754064.

It is an arithmetic number, because the mean of its divisors is an integer number (129734748).

Almost surely, 2^2139764049 is an apocalyptic number.

It is an amenable number.

2139764049 is a deficient number, since it is larger than the sum of its proper divisors (973869903).

2139764049 is a wasteful number, since it uses less digits than its factorization.

2139764049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3437 (or 3434 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The square root of 2139764049 is about 46257.5836917580. The cubic root of 2139764049 is about 1288.6113793809.

The spelling of 2139764049 in words is "two billion, one hundred thirty-nine million, seven hundred sixty-four thousand, forty-nine".