13939229 has 4 divisors (see below), whose sum is σ = 13946976. Its totient is φ = 13931484.

The previous prime is 13939223. The next prime is 13939231. The reversal of 13939229 is 92293931.

13939229 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 13939229 - 2¹² = 13935133 is a prime.

It is a super-2 number, since 2×13939229² = 388604210228882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13939192 and 13939201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13939223) 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, 392 + ... + 5294.

It is an arithmetic number, because the mean of its divisors is an integer number (3486744).

Almost surely, 2^13939229 is an apocalyptic number.

It is an amenable number.

13939229 is a deficient number, since it is larger than the sum of its proper divisors (7747).

13939229 is an equidigital number, since it uses as much as digits as its factorization.

13939229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7746.

The product of its digits is 26244, while the sum is 38.

The square root of 13939229 is about 3733.5276883934. The cubic root of 13939229 is about 240.6649902389.

It can be divided in two parts, 1393922 and 9, that added together give a palindrome (1393931).

The spelling of 13939229 in words is "thirteen million, nine hundred thirty-nine thousand, two hundred twenty-nine".