2149377649 has 4 divisors (see below), whose sum is σ = 2169096820. Its totient is φ = 2129658480.

The previous prime is 2149377647. The next prime is 2149377673. The reversal of 2149377649 is 9467739412.

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

It can be written as a sum of positive squares in 2 ways, for example, as 977000049 + 1172377600 = 31257^2 + 34240^2 .

It is a cyclic number.

It is not a de Polignac number, because 2149377649 - 2¹ = 2149377647 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2149377596 and 2149377605.

It is not an unprimeable number, because it can be changed into a prime (2149377647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9859422 + ... + 9859639.

It is an arithmetic number, because the mean of its divisors is an integer number (542274205).

Almost surely, 2^2149377649 is an apocalyptic number.

It is an amenable number.

2149377649 is a deficient number, since it is larger than the sum of its proper divisors (19719171).

2149377649 is a wasteful number, since it uses less digits than its factorization.

2149377649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19719170.

The product of its digits is 2286144, while the sum is 52.

The square root of 2149377649 is about 46361.3810083349. The cubic root of 2149377649 is about 1290.5383344956.

The spelling of 2149377649 in words is "two billion, one hundred forty-nine million, three hundred seventy-seven thousand, six hundred forty-nine".