13865893 has 6 divisors (see below), whose sum is σ = 14169446. Its totient is φ = 13568712.

The previous prime is 13865881. The next prime is 13865911. The reversal of 13865893 is 39856831.

It can be written as a sum of positive squares in only one way, i.e., 13786369 + 79524 = 3713^2 + 282^2 .

It is not a de Polignac number, because 13865893 - 2²¹ = 11768741 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 (13865833) 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 5 ways as a sum of consecutive naturals, for example, 930 + ... + 5347.

Almost surely, 2^13865893 is an apocalyptic number.

It is an amenable number.

13865893 is a deficient number, since it is larger than the sum of its proper divisors (303553).

13865893 is an frugal number, since it uses more digits than its factorization.

13865893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6371 (or 6324 counting only the distinct ones).

The product of its digits is 155520, while the sum is 43.

The square root of 13865893 is about 3723.6934621421. The cubic root of 13865893 is about 240.2421918566.

The spelling of 13865893 in words is "thirteen million, eight hundred sixty-five thousand, eight hundred ninety-three".