13993678 has 4 divisors (see below), whose sum is σ = 20990520. Its totient is φ = 6996838.

The previous prime is 13993621. The next prime is 13993691. The reversal of 13993678 is 87639931.

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

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 3498418 + ... + 3498421.

It is an arithmetic number, because the mean of its divisors is an integer number (5247630).

Almost surely, 2^13993678 is an apocalyptic number.

13993678 is a deficient number, since it is larger than the sum of its proper divisors (6996842).

13993678 is an equidigital number, since it uses as much as digits as its factorization.

13993678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6996841.

The product of its digits is 244944, while the sum is 46.

The square root of 13993678 is about 3740.8124785934. The cubic root of 13993678 is about 240.9779425759.

The spelling of 13993678 in words is "thirteen million, nine hundred ninety-three thousand, six hundred seventy-eight".