12279429947 has 4 divisors (see below), whose sum is σ = 12417401160. Its totient is φ = 12141458736.

The previous prime is 12279429941. The next prime is 12279429971. The reversal of 12279429947 is 74992497221.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12279429947 - 2⁸ = 12279429691 is a prime.

It is a super-3 number, since 3×12279429947³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12279429892 and 12279429901.

It is not an unprimeable number, because it can be changed into a prime (12279429941) 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, 68985473 + ... + 68985650.

It is an arithmetic number, because the mean of its divisors is an integer number (3104350290).

Almost surely, 2^12279429947 is an apocalyptic number.

12279429947 is a deficient number, since it is larger than the sum of its proper divisors (137971213).

12279429947 is an equidigital number, since it uses as much as digits as its factorization.

12279429947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137971212.

The product of its digits is 4572288, while the sum is 56.

The spelling of 12279429947 in words is "twelve billion, two hundred seventy-nine million, four hundred twenty-nine thousand, nine hundred forty-seven".