13927989 has 8 divisors (see below), whose sum is σ = 18613120. Its totient is φ = 9264096.

The previous prime is 13927961. The next prime is 13927993. The reversal of 13927989 is 98972931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13927989 - 2¹² = 13923893 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 (13927909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3709 + ... + 6450.

It is an arithmetic number, because the mean of its divisors is an integer number (2326640).

Almost surely, 2^13927989 is an apocalyptic number.

It is an amenable number.

13927989 is a deficient number, since it is larger than the sum of its proper divisors (4685131).

13927989 is a wasteful number, since it uses less digits than its factorization.

13927989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10619.

The product of its digits is 244944, while the sum is 48.

The square root of 13927989 is about 3732.0221060439. The cubic root of 13927989 is about 240.6002855147.

The spelling of 13927989 in words is "thirteen million, nine hundred twenty-seven thousand, nine hundred eighty-nine".