13857349 has 4 divisors (see below), whose sum is σ = 15117120. Its totient is φ = 12597580.

The previous prime is 13857343. The next prime is 13857359. The reversal of 13857349 is 94375831.

13857349 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13857349 - 2⁵ = 13857317 is a prime.

It is a super-2 number, since 2×13857349² = 384052242615602, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13857343) 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, 629869 + ... + 629890.

It is an arithmetic number, because the mean of its divisors is an integer number (3779280).

Almost surely, 2^13857349 is an apocalyptic number.

It is an amenable number.

13857349 is a deficient number, since it is larger than the sum of its proper divisors (1259771).

13857349 is a wasteful number, since it uses less digits than its factorization.

13857349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1259770.

The product of its digits is 90720, while the sum is 40.

The square root of 13857349 is about 3722.5460373245. The cubic root of 13857349 is about 240.1928369147.

The spelling of 13857349 in words is "thirteen million, eight hundred fifty-seven thousand, three hundred forty-nine".