13670647 has 4 divisors (see below), whose sum is σ = 13754680. Its totient is φ = 13586616.

The previous prime is 13670639. The next prime is 13670651. The reversal of 13670647 is 74607631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74607631 = 7 ⋅10658233.

It is a cyclic number.

It is not a de Polignac number, because 13670647 - 2³ = 13670639 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 (13670617) 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 3 ways as a sum of consecutive naturals, for example, 41772 + ... + 42097.

It is an arithmetic number, because the mean of its divisors is an integer number (3438670).

Almost surely, 2^13670647 is an apocalyptic number.

13670647 is a deficient number, since it is larger than the sum of its proper divisors (84033).

13670647 is an equidigital number, since it uses as much as digits as its factorization.

13670647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84032.

The product of its (nonzero) digits is 21168, while the sum is 34.

The square root of 13670647 is about 3697.3838048004. The cubic root of 13670647 is about 239.1092385328.

The spelling of 13670647 in words is "thirteen million, six hundred seventy thousand, six hundred forty-seven".