13981823 has 4 divisors (see below), whose sum is σ = 13996320. Its totient is φ = 13967328.

The previous prime is 13981801. The next prime is 13981843. The reversal of 13981823 is 32818931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32818931 = 491 ⋅66841.

It is a cyclic number.

It is not a de Polignac number, because 13981823 - 2¹² = 13977727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13981843) 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, 5690 + ... + 7767.

It is an arithmetic number, because the mean of its divisors is an integer number (3499080).

Almost surely, 2^13981823 is an apocalyptic number.

13981823 is a deficient number, since it is larger than the sum of its proper divisors (14497).

13981823 is a wasteful number, since it uses less digits than its factorization.

13981823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14496.

The product of its digits is 10368, while the sum is 35.

The square root of 13981823 is about 3739.2275940360. The cubic root of 13981823 is about 240.9098737280.

The spelling of 13981823 in words is "thirteen million, nine hundred eighty-one thousand, eight hundred twenty-three".