13920689 has 8 divisors (see below), whose sum is σ = 14354592. Its totient is φ = 13491360.

The previous prime is 13920679. The next prime is 13920713. The reversal of 13920689 is 98602931.

13920689 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13920689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13920649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5642 + ... + 7724.

It is an arithmetic number, because the mean of its divisors is an integer number (1794324).

Almost surely, 2^13920689 is an apocalyptic number.

It is an amenable number.

13920689 is a deficient number, since it is larger than the sum of its proper divisors (433903).

13920689 is a wasteful number, since it uses less digits than its factorization.

13920689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2287.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 13920689 is about 3731.0439557850. The cubic root of 13920689 is about 240.5582433356.

The spelling of 13920689 in words is "thirteen million, nine hundred twenty thousand, six hundred eighty-nine".