2139659171 has 4 divisors (see below), whose sum is σ = 2304248352. Its totient is φ = 1975069992.

The previous prime is 2139659167. The next prime is 2139659189. The reversal of 2139659171 is 1719569312.

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

It is a cyclic number.

It is not a de Polignac number, because 2139659171 - 2² = 2139659167 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2139659771) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82294571 + ... + 82294596.

It is an arithmetic number, because the mean of its divisors is an integer number (576062088).

Almost surely, 2^2139659171 is an apocalyptic number.

2139659171 is a deficient number, since it is larger than the sum of its proper divisors (164589181).

2139659171 is a wasteful number, since it uses less digits than its factorization.

2139659171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164589180.

The product of its digits is 102060, while the sum is 44.

The square root of 2139659171 is about 46256.4500475339. The cubic root of 2139659171 is about 1288.5903257836.

The spelling of 2139659171 in words is "two billion, one hundred thirty-nine million, six hundred fifty-nine thousand, one hundred seventy-one".