13981927 has 2 divisors, whose sum is σ = 13981928. Its totient is φ = 13981926.

The previous prime is 13981921. The next prime is 13981937. The reversal of 13981927 is 72918931.

It is a weak prime.

It is an emirp because it is prime and its reverse (72918931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13981927 - 2²³ = 5593319 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13981927.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13981921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6990963 + 6990964.

It is an arithmetic number, because the mean of its divisors is an integer number (6990964).

Almost surely, 2^13981927 is an apocalyptic number.

13981927 is a deficient number, since it is larger than the sum of its proper divisors (1).

13981927 is an equidigital number, since it uses as much as digits as its factorization.

13981927 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27216, while the sum is 40.

The square root of 13981927 is about 3739.2415006255. The cubic root of 13981927 is about 240.9104710408.

The spelling of 13981927 in words is "thirteen million, nine hundred eighty-one thousand, nine hundred twenty-seven".