13109847 has 4 divisors (see below), whose sum is σ = 17479800. Its totient is φ = 8739896.

The previous prime is 13109843. The next prime is 13109861. The reversal of 13109847 is 74890131.

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 13109847 - 2² = 13109843 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13109843) 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, 2184972 + ... + 2184977.

It is an arithmetic number, because the mean of its divisors is an integer number (4369950).

Almost surely, 2^13109847 is an apocalyptic number.

13109847 is a deficient number, since it is larger than the sum of its proper divisors (4369953).

13109847 is an equidigital number, since it uses as much as digits as its factorization.

13109847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4369952.

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 13109847 is about 3620.7522699019. The cubic root of 13109847 is about 235.7938866405.

Adding to 13109847 its reverse (74890131), we get a palindrome (87999978).

The spelling of 13109847 in words is "thirteen million, one hundred nine thousand, eight hundred forty-seven".