2109207 has 8 divisors (see below), whose sum is σ = 2977776. Its totient is φ = 1323392.

The previous prime is 2109203. The next prime is 2109223. The reversal of 2109207 is 7029012.

It is a happy number.

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 2109207 - 2² = 2109203 is a prime.

2109207 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2109203) 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, 20628 + ... + 20729.

It is an arithmetic number, because the mean of its divisors is an integer number (372222).

2^2109207 is an apocalyptic number.

2109207 is a deficient number, since it is larger than the sum of its proper divisors (868569).

2109207 is a wasteful number, since it uses less digits than its factorization.

2109207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41377.

The product of its (nonzero) digits is 252, while the sum is 21.

The square root of 2109207 is about 1452.3109171248. The cubic root of 2109207 is about 128.2447911583.

The spelling of 2109207 in words is "two million, one hundred nine thousand, two hundred seven".