13604947 has 4 divisors (see below), whose sum is σ = 14405256. Its totient is φ = 12804640.

The previous prime is 13604933. The next prime is 13604951. The reversal of 13604947 is 74940631.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13604947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13604917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 400129 + ... + 400162.

It is an arithmetic number, because the mean of its divisors is an integer number (3601314).

Almost surely, 2^13604947 is an apocalyptic number.

13604947 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

13604947 is a deficient number, since it is larger than the sum of its proper divisors (800309).

13604947 is an equidigital number, since it uses as much as digits as its factorization.

13604947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 800308.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 13604947 is about 3688.4884437937. The cubic root of 13604947 is about 238.7255768444.

The spelling of 13604947 in words is "thirteen million, six hundred four thousand, nine hundred forty-seven".