13890293 has 8 divisors (see below), whose sum is σ = 14263128. Its totient is φ = 13521664.

The previous prime is 13890287. The next prime is 13890301. The reversal of 13890293 is 39209831.

It can be written as a sum of positive squares in 4 ways, for example, as 6589489 + 7300804 = 2567^2 + 2702^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13890293 - 2⁴ = 13890277 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 (13890223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6305 + ... + 8217.

It is an arithmetic number, because the mean of its divisors is an integer number (1782891).

Almost surely, 2^13890293 is an apocalyptic number.

It is an amenable number.

13890293 is a deficient number, since it is larger than the sum of its proper divisors (372835).

13890293 is a wasteful number, since it uses less digits than its factorization.

13890293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2103.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 13890293 is about 3726.9683390123. The cubic root of 13890293 is about 240.3830284262.

The spelling of 13890293 in words is "thirteen million, eight hundred ninety thousand, two hundred ninety-three".