12939229 has 4 divisors (see below), whose sum is σ = 12953376. Its totient is φ = 12925084.

The previous prime is 12939217. The next prime is 12939257. The reversal of 12939229 is 92293921.

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 an emirpimes, since its reverse is a distinct semiprime: 92293921 = 29 ⋅3182549.

It is a cyclic number.

It is not a de Polignac number, because 12939229 - 2⁵ = 12939197 is a prime.

It is a super-2 number, since 2×12939229² = 334847294228882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12939029) 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, 5599 + ... + 7564.

It is an arithmetic number, because the mean of its divisors is an integer number (3238344).

Almost surely, 2^12939229 is an apocalyptic number.

It is an amenable number.

12939229 is a deficient number, since it is larger than the sum of its proper divisors (14147).

12939229 is an equidigital number, since it uses as much as digits as its factorization.

12939229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14146.

The product of its digits is 17496, while the sum is 37.

The square root of 12939229 is about 3597.1139820695. The cubic root of 12939229 is about 234.7665041552.

The spelling of 12939229 in words is "twelve million, nine hundred thirty-nine thousand, two hundred twenty-nine".