13656023 has 4 divisors (see below), whose sum is σ = 13755840. Its totient is φ = 13556208.

The previous prime is 13656011. The next prime is 13656029. The reversal of 13656023 is 32065631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32065631 = 13 ⋅2466587.

It is a cyclic number.

It is not a de Polignac number, because 13656023 - 2⁶ = 13655959 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13655983 and 13656001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13656029) 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, 49703 + ... + 49976.

It is an arithmetic number, because the mean of its divisors is an integer number (3438960).

Almost surely, 2^13656023 is an apocalyptic number.

13656023 is a deficient number, since it is larger than the sum of its proper divisors (99817).

13656023 is an equidigital number, since it uses as much as digits as its factorization.

13656023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99816.

The product of its (nonzero) digits is 3240, while the sum is 26.

The square root of 13656023 is about 3695.4056610878. The cubic root of 13656023 is about 239.0239467611.

The spelling of 13656023 in words is "thirteen million, six hundred fifty-six thousand, twenty-three".