2173902149 has 12 divisors (see below), whose sum is σ = 2316467916. Its totient is φ = 2033050752.

The previous prime is 2173902131. The next prime is 2173902151. The reversal of 2173902149 is 9412093712.

It can be written as a sum of positive squares in 2 ways, for example, as 1660562500 + 513339649 = 40750^2 + 22657^2 .

It is a de Polignac number, because none of the positive numbers 2^k-2173902149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2173902179) 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 11 ways as a sum of consecutive naturals, for example, 449267 + ... + 454079.

It is an arithmetic number, because the mean of its divisors is an integer number (193038993).

Almost surely, 2^2173902149 is an apocalyptic number.

It is an amenable number.

2173902149 is a deficient number, since it is larger than the sum of its proper divisors (142565767).

2173902149 is an equidigital number, since it uses as much as digits as its factorization.

2173902149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5156 (or 4993 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 2173902149 is about 46625.1235816057. The cubic root of 2173902149 is about 1295.4281513887.

The spelling of 2173902149 in words is "two billion, one hundred seventy-three million, nine hundred two thousand, one hundred forty-nine".