13776814 has 4 divisors (see below), whose sum is σ = 20665224. Its totient is φ = 6888406.

The previous prime is 13776809. The next prime is 13776821. The reversal of 13776814 is 41867731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 41867731 = 131 ⋅319601.

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, 3444202 + ... + 3444205.

It is an arithmetic number, because the mean of its divisors is an integer number (5166306).

Almost surely, 2^13776814 is an apocalyptic number.

13776814 is a deficient number, since it is larger than the sum of its proper divisors (6888410).

13776814 is an equidigital number, since it uses as much as digits as its factorization.

13776814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6888409.

The product of its digits is 28224, while the sum is 37.

The square root of 13776814 is about 3711.7130815838. The cubic root of 13776814 is about 239.7266215896.

The spelling of 13776814 in words is "thirteen million, seven hundred seventy-six thousand, eight hundred fourteen".