13613816 has 8 divisors (see below), whose sum is σ = 25525920. Its totient is φ = 6806904.

The previous prime is 13613813. The next prime is 13613857. The reversal of 13613816 is 61831631.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13613813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 850856 + ... + 850871.

It is an arithmetic number, because the mean of its divisors is an integer number (3190740).

Almost surely, 2^13613816 is an apocalyptic number.

It is an amenable number.

13613816 is a deficient number, since it is larger than the sum of its proper divisors (11912104).

13613816 is a wasteful number, since it uses less digits than its factorization.

13613816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1701733 (or 1701729 counting only the distinct ones).

The product of its digits is 2592, while the sum is 29.

The square root of 13613816 is about 3689.6905019256. The cubic root of 13613816 is about 238.7774402641. Note that the first 3 decimals are identical.

The spelling of 13613816 in words is "thirteen million, six hundred thirteen thousand, eight hundred sixteen".