13659994 has 4 divisors (see below), whose sum is σ = 20489994. Its totient is φ = 6829996.

The previous prime is 13659991. The next prime is 13660001. The reversal of 13659994 is 49995631.

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

It can be written as a sum of positive squares in only one way, i.e., 10725625 + 2934369 = 3275^2 + 1713^2 .

It is not an unprimeable number, because it can be changed into a prime (13659991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3414997 + ... + 3415000.

Almost surely, 2^13659994 is an apocalyptic number.

13659994 is a deficient number, since it is larger than the sum of its proper divisors (6830000).

13659994 is an equidigital number, since it uses as much as digits as its factorization.

13659994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6829999.

The product of its digits is 262440, while the sum is 46.

The square root of 13659994 is about 3695.9429108145. The cubic root of 13659994 is about 239.0471129032.

The spelling of 13659994 in words is "thirteen million, six hundred fifty-nine thousand, nine hundred ninety-four".