2109650 has 12 divisors (see below), whose sum is σ = 3924042. Its totient is φ = 843840.

The previous prime is 2109647. The next prime is 2109671. The reversal of 2109650 is 569012.

It can be written as a sum of positive squares in 3 ways, for example, as 1615441 + 494209 = 1271^2 + 703^2 .

It is an Ulam number.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21047 + ... + 21146.

2^2109650 is an apocalyptic number.

2109650 is a deficient number, since it is larger than the sum of its proper divisors (1814392).

2109650 is a wasteful number, since it uses less digits than its factorization.

2109650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42205 (or 42200 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 2109650 is about 1452.4634246686. The cubic root of 2109650 is about 128.2537690135.

The spelling of 2109650 in words is "two million, one hundred nine thousand, six hundred fifty".