2129899 has 4 divisors (see below), whose sum is σ = 2175264. Its totient is φ = 2084536.

The previous prime is 2129891. The next prime is 2129903. The reversal of 2129899 is 9989212.

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 2129899 - 2³ = 2129891 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2129891) 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, 22612 + ... + 22705.

It is an arithmetic number, because the mean of its divisors is an integer number (543816).

2^2129899 is an apocalyptic number.

2129899 is a deficient number, since it is larger than the sum of its proper divisors (45365).

2129899 is an equidigital number, since it uses as much as digits as its factorization.

2129899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45364.

The product of its digits is 23328, while the sum is 40.

The square root of 2129899 is about 1459.4173494926. The cubic root of 2129899 is about 128.6628014207.

The spelling of 2129899 in words is "two million, one hundred twenty-nine thousand, eight hundred ninety-nine".