13609478 has 4 divisors (see below), whose sum is σ = 20414220. Its totient is φ = 6804738.

The previous prime is 13609433. The next prime is 13609481. The reversal of 13609478 is 87490631.

13609478 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 87490631 = 139 ⋅629429.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3402368 + ... + 3402371.

It is an arithmetic number, because the mean of its divisors is an integer number (5103555).

Almost surely, 2^13609478 is an apocalyptic number.

13609478 is a deficient number, since it is larger than the sum of its proper divisors (6804742).

13609478 is an equidigital number, since it uses as much as digits as its factorization.

13609478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6804741.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 13609478 is about 3689.1026009045. The cubic root of 13609478 is about 238.7520756743.

The spelling of 13609478 in words is "thirteen million, six hundred nine thousand, four hundred seventy-eight".