13447679 has 4 divisors (see below), whose sum is σ = 15368784. Its totient is φ = 11526576.

The previous prime is 13447673. The next prime is 13447699. The reversal of 13447679 is 97674431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97674431 = 2999 ⋅32569.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13447679 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 (13447673) 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, 960542 + ... + 960555.

It is an arithmetic number, because the mean of its divisors is an integer number (3842196).

Almost surely, 2^13447679 is an apocalyptic number.

13447679 is a deficient number, since it is larger than the sum of its proper divisors (1921105).

13447679 is an equidigital number, since it uses as much as digits as its factorization.

13447679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1921104.

The product of its digits is 127008, while the sum is 41.

The square root of 13447679 is about 3667.1077158982. The cubic root of 13447679 is about 237.8021506171.

The spelling of 13447679 in words is "thirteen million, four hundred forty-seven thousand, six hundred seventy-nine".