13899814 has 4 divisors (see below), whose sum is σ = 20849724. Its totient is φ = 6949906.

The previous prime is 13899803. The next prime is 13899839. The reversal of 13899814 is 41899831.

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 polite number, since it can be written as a sum of consecutive naturals, namely, 3474952 + ... + 3474955.

It is an arithmetic number, because the mean of its divisors is an integer number (5212431).

Almost surely, 2^13899814 is an apocalyptic number.

13899814 is a deficient number, since it is larger than the sum of its proper divisors (6949910).

13899814 is an equidigital number, since it uses as much as digits as its factorization.

13899814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6949909.

The product of its digits is 62208, while the sum is 43.

The square root of 13899814 is about 3728.2454318352. The cubic root of 13899814 is about 240.4379388132.

The spelling of 13899814 in words is "thirteen million, eight hundred ninety-nine thousand, eight hundred fourteen".