2109969 has 24 divisors (see below), whose sum is σ = 3334240. Its totient is φ = 1329696.

The previous prime is 2109959. The next prime is 2109973. The reversal of 2109969 is 9699012.

It is not a de Polignac number, because 2109969 - 2⁷ = 2109841 is a prime.

It is a super-2 number, since 2×2109969² = 8903938361922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

2109969 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2109949) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4389 + ... + 4845.

2^2109969 is an apocalyptic number.

It is an amenable number.

2109969 is a deficient number, since it is larger than the sum of its proper divisors (1224271).

2109969 is an equidigital number, since it uses as much as digits as its factorization.

2109969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491 (or 479 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 36.

The square root of 2109969 is about 1452.5732339541. The cubic root of 2109969 is about 128.2602331016.

The spelling of 2109969 in words is "two million, one hundred nine thousand, nine hundred sixty-nine".