13800817 has 4 divisors (see below), whose sum is σ = 13927540. Its totient is φ = 13674096.

The previous prime is 13800799. The next prime is 13800841. The reversal of 13800817 is 71800831.

It is a happy number.

13800817 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 an emirpimes, since its reverse is a distinct semiprime: 71800831 = 37 ⋅1940563.

It can be written as a sum of positive squares in 2 ways, for example, as 4704561 + 9096256 = 2169^2 + 3016^2 .

It is a cyclic number.

It is not a de Polignac number, because 13800817 - 2¹⁵ = 13768049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13800217) 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, 63198 + ... + 63415.

It is an arithmetic number, because the mean of its divisors is an integer number (3481885).

Almost surely, 2^13800817 is an apocalyptic number.

It is an amenable number.

13800817 is a deficient number, since it is larger than the sum of its proper divisors (126723).

13800817 is a wasteful number, since it uses less digits than its factorization.

13800817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126722.

The product of its (nonzero) digits is 1344, while the sum is 28.

The square root of 13800817 is about 3714.9450870773. The cubic root of 13800817 is about 239.8657640540.

The spelling of 13800817 in words is "thirteen million, eight hundred thousand, eight hundred seventeen".