13909923 has 6 divisors (see below), whose sum is σ = 20092124. Its totient is φ = 9273276.

The previous prime is 13909921. The next prime is 13909939. The reversal of 13909923 is 32990931.

13909923 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13909923 - 2¹ = 13909921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13909921) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 772765 + ... + 772782.

Almost surely, 2^13909923 is an apocalyptic number.

13909923 is a deficient number, since it is larger than the sum of its proper divisors (6182201).

13909923 is a wasteful number, since it uses less digits than its factorization.

13909923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1545553 (or 1545550 counting only the distinct ones).

The product of its (nonzero) digits is 13122, while the sum is 36.

The square root of 13909923 is about 3729.6009169883. The cubic root of 13909923 is about 240.4962129293.

The spelling of 13909923 in words is "thirteen million, nine hundred nine thousand, nine hundred twenty-three".