13943318 has 4 divisors (see below), whose sum is σ = 20914980. Its totient is φ = 6971658.

The previous prime is 13943299. The next prime is 13943323. The reversal of 13943318 is 81334931.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×13943318² = 388832233698248, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3485828 + ... + 3485831.

It is an arithmetic number, because the mean of its divisors is an integer number (5228745).

Almost surely, 2^13943318 is an apocalyptic number.

13943318 is a deficient number, since it is larger than the sum of its proper divisors (6971662).

13943318 is an equidigital number, since it uses as much as digits as its factorization.

13943318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6971661.

The product of its digits is 7776, while the sum is 32.

The square root of 13943318 is about 3734.0752536605. The cubic root of 13943318 is about 240.6885205440.

The spelling of 13943318 in words is "thirteen million, nine hundred forty-three thousand, three hundred eighteen".