13478689 has 8 divisors (see below), whose sum is σ = 15508800. Its totient is φ = 11474736.

The previous prime is 13478681. The next prime is 13478701. The reversal of 13478689 is 98687431.

13478689 = 46² + 47² + ... + 343².

It is a happy number.

13478689 is digitally balanced in base 2 and base 3, because in such bases 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 not a de Polignac number, because 13478689 - 2³ = 13478681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13478681) 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, 5419 + ... + 7504.

It is an arithmetic number, because the mean of its divisors is an integer number (1938600).

Almost surely, 2^13478689 is an apocalyptic number.

It is an amenable number.

13478689 is a deficient number, since it is larger than the sum of its proper divisors (2030111).

13478689 is a wasteful number, since it uses less digits than its factorization.

13478689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13079.

The product of its digits is 290304, while the sum is 46.

The square root of 13478689 is about 3671.3334089946. Note that the first 3 decimals coincide. The cubic root of 13478689 is about 237.9847988314.

The spelling of 13478689 in words is "thirteen million, four hundred seventy-eight thousand, six hundred eighty-nine".