2139659172 has 48 divisors (see below), whose sum is σ = 6339733120. Its totient is φ = 611330976.

The previous prime is 2139659167. The next prime is 2139659189. The reversal of 2139659172 is 2719569312.

It is a happy number.

2139659172 is a `hidden beast` number, since 21 + 39 + 6 + 591 + 7 + 2 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1414363 + ... + 1415874.

Almost surely, 2^2139659172 is an apocalyptic number.

It is an amenable number.

2139659172 is an abundant number, since it is smaller than the sum of its proper divisors (4200073948).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2139659172 is a wasteful number, since it uses less digits than its factorization.

2139659172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2830257 (or 2830249 counting only the distinct ones).

The product of its digits is 204120, while the sum is 45.

The square root of 2139659172 is about 46256.4500583432. The cubic root of 2139659172 is about 1288.5903259843.

The spelling of 2139659172 in words is "two billion, one hundred thirty-nine million, six hundred fifty-nine thousand, one hundred seventy-two".