13105923 has 4 divisors (see below), whose sum is σ = 17474568. Its totient is φ = 8737280.

The previous prime is 13105921. The next prime is 13105943. The reversal of 13105923 is 32950131.

It is a happy number.

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 13105923 - 2¹ = 13105921 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13105893 and 13105902.

It is not an unprimeable number, because it can be changed into a prime (13105921) 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, 2184318 + ... + 2184323.

It is an arithmetic number, because the mean of its divisors is an integer number (4368642).

Almost surely, 2^13105923 is an apocalyptic number.

13105923 is a deficient number, since it is larger than the sum of its proper divisors (4368645).

13105923 is an equidigital number, since it uses as much as digits as its factorization.

13105923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4368644.

The product of its (nonzero) digits is 810, while the sum is 24.

The square root of 13105923 is about 3620.2103530044. The cubic root of 13105923 is about 235.7703585871.

It can be divided in two parts, 13105 and 923, that added together give a triangular number (14028 = T₁₆₇).

The spelling of 13105923 in words is "thirteen million, one hundred five thousand, nine hundred twenty-three".