2109902 has 4 divisors (see below), whose sum is σ = 3164856. Its totient is φ = 1054950.

The previous prime is 2109889. The next prime is 2109911. The reversal of 2109902 is 2099012.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 527474 + ... + 527477.

It is an arithmetic number, because the mean of its divisors is an integer number (791214).

2^2109902 is an apocalyptic number.

2109902 is a deficient number, since it is larger than the sum of its proper divisors (1054954).

2109902 is a wasteful number, since it uses less digits than its factorization.

2109902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1054953.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 2109902 is about 1452.5501712505. The cubic root of 2109902 is about 128.2588754945.

The spelling of 2109902 in words is "two million, one hundred nine thousand, nine hundred two".