2129939 has 8 divisors (see below), whose sum is σ = 2453088. Its totient is φ = 1811520.

The previous prime is 2129903. The next prime is 2129951. The reversal of 2129939 is 9399212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2129939 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2129899 and 2129908.

It is not an unprimeable number, because it can be changed into a prime (2123939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152 + ... + 2069.

It is an arithmetic number, because the mean of its divisors is an integer number (306636).

2^2129939 is an apocalyptic number.

2129939 is a deficient number, since it is larger than the sum of its proper divisors (323149).

2129939 is a wasteful number, since it uses less digits than its factorization.

2129939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2365.

The product of its digits is 8748, while the sum is 35.

The square root of 2129939 is about 1459.4310535274. The cubic root of 2129939 is about 128.6636068548.

The spelling of 2129939 in words is "two million, one hundred twenty-nine thousand, nine hundred thirty-nine".