2138199929 has 4 divisors (see below), whose sum is σ = 2150145360. Its totient is φ = 2126254500.

The previous prime is 2138199913. The next prime is 2138199953. The reversal of 2138199929 is 9299918312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2138199929 - 2⁴ = 2138199913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2138199989) 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, 5972447 + ... + 5972804.

It is an arithmetic number, because the mean of its divisors is an integer number (537536340).

Almost surely, 2^2138199929 is an apocalyptic number.

It is an amenable number.

2138199929 is a deficient number, since it is larger than the sum of its proper divisors (11945431).

2138199929 is a wasteful number, since it uses less digits than its factorization.

2138199929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11945430.

The product of its digits is 629856, while the sum is 53.

The square root of 2138199929 is about 46240.6739678392. The cubic root of 2138199929 is about 1288.2973207449.

The spelling of 2138199929 in words is "two billion, one hundred thirty-eight million, one hundred ninety-nine thousand, nine hundred twenty-nine".