13639616 has 14 divisors (see below), whose sum is σ = 27066240. Its totient is φ = 6819776.

The previous prime is 13639553. The next prime is 13639631. The reversal of 13639616 is 61693631.

It is a zygodrome in base 3.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106496 + ... + 106623.

Almost surely, 2^13639616 is an apocalyptic number.

13639616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

13639616 is a deficient number, since it is larger than the sum of its proper divisors (13426624).

13639616 is an equidigital number, since it uses as much as digits as its factorization.

13639616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213131 (or 213121 counting only the distinct ones).

The product of its digits is 17496, while the sum is 35.

The square root of 13639616 is about 3693.1850752433. The cubic root of 13639616 is about 238.9281834606.

The spelling of 13639616 in words is "thirteen million, six hundred thirty-nine thousand, six hundred sixteen".