2109123 has 18 divisors (see below), whose sum is σ = 3191916. Its totient is φ = 1341912.

The previous prime is 2109119. The next prime is 2109127. The reversal of 2109123 is 3219012.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2109119) and next prime (2109127).

It is not a de Polignac number, because 2109123 - 2² = 2109119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2109096 and 2109105.

It is not an unprimeable number, because it can be changed into a prime (2109127) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4540 + ... + 4982.

2^2109123 is an apocalyptic number.

2109123 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

2109123 is a deficient number, since it is larger than the sum of its proper divisors (1082793).

2109123 is a wasteful number, since it uses less digits than its factorization.

2109123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495 (or 469 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 2109123 is about 1452.2819974096. The cubic root of 2109123 is about 128.2430886692.

The spelling of 2109123 in words is "two million, one hundred nine thousand, one hundred twenty-three".