2149829747 has 4 divisors (see below), whose sum is σ = 2315201280. Its totient is φ = 1984458216.

The previous prime is 2149829719. The next prime is 2149829749. The reversal of 2149829747 is 7479289412.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-2149829747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2149829749) 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, 82685747 + ... + 82685772.

It is an arithmetic number, because the mean of its divisors is an integer number (578800320).

Almost surely, 2^2149829747 is an apocalyptic number.

2149829747 is a deficient number, since it is larger than the sum of its proper divisors (165371533).

2149829747 is a wasteful number, since it uses less digits than its factorization.

2149829747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165371532.

The product of its digits is 2032128, while the sum is 53.

The square root of 2149829747 is about 46366.2565558187. The cubic root of 2149829747 is about 1290.6288116775.

The spelling of 2149829747 in words is "two billion, one hundred forty-nine million, eight hundred twenty-nine thousand, seven hundred forty-seven".