13827997 has 4 divisors (see below), whose sum is σ = 13836096. Its totient is φ = 13819900.

The previous prime is 13827977. The next prime is 13828039. The reversal of 13827997 is 79972831.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 79972831 = 193 ⋅414367.

It is a cyclic number.

It is not a de Polignac number, because 13827997 - 2²³ = 5439389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13827977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 379 + ... + 5272.

It is an arithmetic number, because the mean of its divisors is an integer number (3459024).

Almost surely, 2^13827997 is an apocalyptic number.

It is an amenable number.

13827997 is a deficient number, since it is larger than the sum of its proper divisors (8099).

13827997 is an equidigital number, since it uses as much as digits as its factorization.

13827997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8098.

The product of its digits is 190512, while the sum is 46.

The square root of 13827997 is about 3718.6014844293. The cubic root of 13827997 is about 240.0231285581.

The spelling of 13827997 in words is "thirteen million, eight hundred twenty-seven thousand, nine hundred ninety-seven".