13613806 has 4 divisors (see below), whose sum is σ = 20420712. Its totient is φ = 6806902.

The previous prime is 13613801. The next prime is 13613807. The reversal of 13613806 is 60831631.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13613801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3403450 + ... + 3403453.

It is an arithmetic number, because the mean of its divisors is an integer number (5105178).

Almost surely, 2^13613806 is an apocalyptic number.

13613806 is a deficient number, since it is larger than the sum of its proper divisors (6806906).

13613806 is an equidigital number, since it uses as much as digits as its factorization.

13613806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6806905.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 13613806 is about 3689.6891467981. The cubic root of 13613806 is about 238.7773817996. Note that the first 3 decimals are identical.

The spelling of 13613806 in words is "thirteen million, six hundred thirteen thousand, eight hundred six".