13870349 has 4 divisors (see below), whose sum is σ = 13883100. Its totient is φ = 13857600.

The previous prime is 13870343. The next prime is 13870387. The reversal of 13870349 is 94307831.

13870349 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.

It can be written as a sum of positive squares in 2 ways, for example, as 5929225 + 7941124 = 2435^2 + 2818^2 .

It is a cyclic number.

It is not a de Polignac number, because 13870349 - 2⁴ = 13870333 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 (13870343) 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, 4574 + ... + 6975.

It is an arithmetic number, because the mean of its divisors is an integer number (3470775).

Almost surely, 2^13870349 is an apocalyptic number.

It is an amenable number.

13870349 is a deficient number, since it is larger than the sum of its proper divisors (12751).

13870349 is a wasteful number, since it uses less digits than its factorization.

13870349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12750.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 13870349 is about 3724.2917447483. The cubic root of 13870349 is about 240.2679241710.

The spelling of 13870349 in words is "thirteen million, eight hundred seventy thousand, three hundred forty-nine".