2129910187 has 4 divisors (see below), whose sum is σ = 2130076216. Its totient is φ = 2129744160.

The previous prime is 2129910179. The next prime is 2129910247. The reversal of 2129910187 is 7810199212.

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 2129910187 - 2³ = 2129910179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2129910157) 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, 61998 + ... + 90019.

It is an arithmetic number, because the mean of its divisors is an integer number (532519054).

Almost surely, 2^2129910187 is an apocalyptic number.

2129910187 is a deficient number, since it is larger than the sum of its proper divisors (166029).

2129910187 is a wasteful number, since it uses less digits than its factorization.

2129910187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166028.

The product of its (nonzero) digits is 18144, while the sum is 40.

The square root of 2129910187 is about 46150.9500118903. The cubic root of 2129910187 is about 1286.6302668149.

The spelling of 2129910187 in words is "two billion, one hundred twenty-nine million, nine hundred ten thousand, one hundred eighty-seven".