13990814 has 4 divisors (see below), whose sum is σ = 20986224. Its totient is φ = 6995406.

The previous prime is 13990807. The next prime is 13990841. The reversal of 13990814 is 41809931.

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, 3497702 + ... + 3497705.

It is an arithmetic number, because the mean of its divisors is an integer number (5246556).

Almost surely, 2^13990814 is an apocalyptic number.

13990814 is a deficient number, since it is larger than the sum of its proper divisors (6995410).

13990814 is an equidigital number, since it uses as much as digits as its factorization.

13990814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6995409.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 13990814 is about 3740.4296544648. The cubic root of 13990814 is about 240.9615016298.

The spelling of 13990814 in words is "thirteen million, nine hundred ninety thousand, eight hundred fourteen".