2100709 has 8 divisors (see below), whose sum is σ = 2274272. Its totient is φ = 1928880.

The previous prime is 2100691. The next prime is 2100713. The reversal of 2100709 is 9070012.

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

It is a cyclic number.

It is not a de Polignac number, because 2100709 - 2²¹ = 3557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100719) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3394 + ... + 3964.

It is an arithmetic number, because the mean of its divisors is an integer number (284284).

2^2100709 is an apocalyptic number.

It is an amenable number.

2100709 is a deficient number, since it is larger than the sum of its proper divisors (173563).

2100709 is a wasteful number, since it uses less digits than its factorization.

2100709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 867.

The product of its (nonzero) digits is 126, while the sum is 19.

The square root of 2100709 is about 1449.3822822154. The cubic root of 2100709 is about 128.0723264744.

It can be divided in two parts, 2100 and 709, that added together give a square (2809 = 53²).

The spelling of 2100709 in words is "two million, one hundred thousand, seven hundred nine".