13609747 has 4 divisors (see below), whose sum is σ = 13977616. Its totient is φ = 13241880.

The previous prime is 13609733. The next prime is 13609751. The reversal of 13609747 is 74790631.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13609747 - 2⁷ = 13609619 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 367831 = 13609747 / (1 + 3 + 6 + 0 + 9 + 7 + 4 + 7).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13609147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 183879 + ... + 183952.

It is an arithmetic number, because the mean of its divisors is an integer number (3494404).

Almost surely, 2^13609747 is an apocalyptic number.

13609747 is a deficient number, since it is larger than the sum of its proper divisors (367869).

13609747 is an equidigital number, since it uses as much as digits as its factorization.

13609747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367868.

The product of its (nonzero) digits is 31752, while the sum is 37.

The square root of 13609747 is about 3689.1390594555. The cubic root of 13609747 is about 238.7536486929.

The spelling of 13609747 in words is "thirteen million, six hundred nine thousand, seven hundred forty-seven".