14381813 has 4 divisors (see below), whose sum is σ = 15227820. Its totient is φ = 13535808.

The previous prime is 14381797. The next prime is 14381819. The reversal of 14381813 is 31818341.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31818341 = 2447 ⋅13003.

It can be written as a sum of positive squares in 2 ways, for example, as 8655364 + 5726449 = 2942^2 + 2393^2 .

It is not a de Polignac number, because 14381813 - 2⁴ = 14381797 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14381819) 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, 422978 + ... + 423011.

It is an arithmetic number, because the mean of its divisors is an integer number (3806955).

Almost surely, 2^14381813 is an apocalyptic number.

It is an amenable number.

14381813 is a deficient number, since it is larger than the sum of its proper divisors (846007).

14381813 is an equidigital number, since it uses as much as digits as its factorization.

14381813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 846006.

The product of its digits is 2304, while the sum is 29.

The square root of 14381813 is about 3792.3360874269. The cubic root of 14381813 is about 243.1856135177.

The spelling of 14381813 in words is "fourteen million, three hundred eighty-one thousand, eight hundred thirteen".