13990123 has 4 divisors (see below), whose sum is σ = 15988720. Its totient is φ = 11991528.

The previous prime is 13990121. The next prime is 13990129. The reversal of 13990123 is 32109931.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13990123 - 2¹ = 13990121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13990091 and 13990100.

It is not an unprimeable number, because it can be changed into a prime (13990121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 999288 + ... + 999301.

It is an arithmetic number, because the mean of its divisors is an integer number (3997180).

Almost surely, 2^13990123 is an apocalyptic number.

13990123 is a deficient number, since it is larger than the sum of its proper divisors (1998597).

13990123 is an equidigital number, since it uses as much as digits as its factorization.

13990123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1998596.

The product of its (nonzero) digits is 1458, while the sum is 28.

The square root of 13990123 is about 3740.3372842566. The cubic root of 13990123 is about 240.9575345712.

The spelling of 13990123 in words is "thirteen million, nine hundred ninety thousand, one hundred twenty-three".