13659678 has 20 divisors (see below), whose sum is σ = 30608160. Its totient is φ = 4553172.

The previous prime is 13659661. The next prime is 13659703. The reversal of 13659678 is 87695631.

It is a happy number.

13659678 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 41998 + ... + 42321.

It is an arithmetic number, because the mean of its divisors is an integer number (1530408).

Almost surely, 2^13659678 is an apocalyptic number.

13659678 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

13659678 is an abundant number, since it is smaller than the sum of its proper divisors (16948482).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13659678 is an equidigital number, since it uses as much as digits as its factorization.

13659678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84333 (or 84324 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 13659678 is about 3695.9001609892. The cubic root of 13659678 is about 239.0452695771.

The spelling of 13659678 in words is "thirteen million, six hundred fifty-nine thousand, six hundred seventy-eight".