13940823 has 16 divisors (see below), whose sum is σ = 20560736. Its totient is φ = 8346240.

The previous prime is 13940809. The next prime is 13940827. The reversal of 13940823 is 32804931.

It is not a de Polignac number, because 13940823 - 2⁸ = 13940567 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 (13940827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3388 + ... + 6273.

It is an arithmetic number, because the mean of its divisors is an integer number (1285046).

Almost surely, 2^13940823 is an apocalyptic number.

13940823 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

13940823 is a deficient number, since it is larger than the sum of its proper divisors (6619913).

13940823 is a wasteful number, since it uses less digits than its factorization.

13940823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9714.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 13940823 is about 3733.7411533206. The cubic root of 13940823 is about 240.6741635194.

The spelling of 13940823 in words is "thirteen million, nine hundred forty thousand, eight hundred twenty-three".