13670387 has 4 divisors (see below), whose sum is σ = 13746096. Its totient is φ = 13594680.

The previous prime is 13670351. The next prime is 13670413. The reversal of 13670387 is 78307631.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13670387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13670317) 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, 37583 + ... + 37944.

It is an arithmetic number, because the mean of its divisors is an integer number (3436524).

Almost surely, 2^13670387 is an apocalyptic number.

13670387 is a deficient number, since it is larger than the sum of its proper divisors (75709).

13670387 is an equidigital number, since it uses as much as digits as its factorization.

13670387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75708.

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 13670387 is about 3697.3486446371. The cubic root of 13670387 is about 239.1077226622.

The spelling of 13670387 in words is "thirteen million, six hundred seventy thousand, three hundred eighty-seven".