12139797 has 8 divisors (see below), whose sum is σ = 16428256. Its totient is φ = 7972272.

The previous prime is 12139789. The next prime is 12139807. The reversal of 12139797 is 79793121.

12139797 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12139797 - 2³ = 12139789 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 (12139697) 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 7 ways as a sum of consecutive naturals, for example, 29998 + ... + 30399.

It is an arithmetic number, because the mean of its divisors is an integer number (2053532).

Almost surely, 2^12139797 is an apocalyptic number.

It is an amenable number.

12139797 is a deficient number, since it is larger than the sum of its proper divisors (4288459).

12139797 is an equidigital number, since it uses as much as digits as its factorization.

12139797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60467.

The product of its digits is 23814, while the sum is 39.

The square root of 12139797 is about 3484.2211468275. The cubic root of 12139797 is about 229.8284606256.

The spelling of 12139797 in words is "twelve million, one hundred thirty-nine thousand, seven hundred ninety-seven".