12147719 has 4 divisors (see below), whose sum is σ = 12156144. Its totient is φ = 12139296.

The previous prime is 12147713. The next prime is 12147727. The reversal of 12147719 is 91774121.

12147719 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 brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 91774121 = 67 ⋅1369763.

It is a cyclic number.

It is not a de Polignac number, because 12147719 - 2⁸ = 12147463 is a prime.

It is a super-2 number, since 2×12147719² = 295134153805922, 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 (12147713) 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, 1442 + ... + 5135.

It is an arithmetic number, because the mean of its divisors is an integer number (3039036).

Almost surely, 2^12147719 is an apocalyptic number.

12147719 is a deficient number, since it is larger than the sum of its proper divisors (8425).

12147719 is an equidigital number, since it uses as much as digits as its factorization.

12147719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8424.

The product of its digits is 3528, while the sum is 32.

The square root of 12147719 is about 3485.3578008578. The cubic root of 12147719 is about 229.8784423830.

The spelling of 12147719 in words is "twelve million, one hundred forty-seven thousand, seven hundred nineteen".