2149663209 has 24 divisors (see below), whose sum is σ = 3056069568. Its totient is φ = 1343788800.

The previous prime is 2149663177. The next prime is 2149663247. The reversal of 2149663209 is 9023669412.

It is not a de Polignac number, because 2149663209 - 2⁵ = 2149663177 is a prime.

It is a super-3 number, since 3×2149663209³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2149663279) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 235684 + ... + 244634.

It is an arithmetic number, because the mean of its divisors is an integer number (127336232).

Almost surely, 2^2149663209 is an apocalyptic number.

It is an amenable number.

2149663209 is a deficient number, since it is larger than the sum of its proper divisors (906406359).

2149663209 is a wasteful number, since it uses less digits than its factorization.

2149663209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9265 (or 9248 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 42.

The square root of 2149663209 is about 46364.4606244913. The cubic root of 2149663209 is about 1290.5954843420.

The spelling of 2149663209 in words is "two billion, one hundred forty-nine million, six hundred sixty-three thousand, two hundred nine".