13639699 has 4 divisors (see below), whose sum is σ = 13647600. Its totient is φ = 13631800.

The previous prime is 13639697. The next prime is 13639727. The reversal of 13639699 is 99693631.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 13639699 - 2¹ = 13639697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13639693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127 + ... + 5224.

It is an arithmetic number, because the mean of its divisors is an integer number (3411900).

Almost surely, 2^13639699 is an apocalyptic number.

13639699 is a deficient number, since it is larger than the sum of its proper divisors (7901).

13639699 is an equidigital number, since it uses as much as digits as its factorization.

13639699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7900.

The product of its digits is 236196, while the sum is 46.

The square root of 13639699 is about 3693.1963121394. The cubic root of 13639699 is about 238.9286681028.

The spelling of 13639699 in words is "thirteen million, six hundred thirty-nine thousand, six hundred ninety-nine".