2102939 has 4 divisors (see below), whose sum is σ = 2213640. Its totient is φ = 1992240.

The previous prime is 2102927. The next prime is 2102941. The reversal of 2102939 is 9392012.

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 2102939 - 2²⁰ = 1054363 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102999) 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, 55322 + ... + 55359.

It is an arithmetic number, because the mean of its divisors is an integer number (553410).

2^2102939 is an apocalyptic number.

2102939 is a deficient number, since it is larger than the sum of its proper divisors (110701).

2102939 is a wasteful number, since it uses less digits than its factorization.

2102939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110700.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 2102939 is about 1450.1513714092. The cubic root of 2102939 is about 128.1176286856.

The spelling of 2102939 in words is "two million, one hundred two thousand, nine hundred thirty-nine".