13899706 has 4 divisors (see below), whose sum is σ = 20849562. Its totient is φ = 6949852.

The previous prime is 13899703. The next prime is 13899737. The reversal of 13899706 is 60799831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60799831 = 6551 ⋅9281.

It can be written as a sum of positive squares in only one way, i.e., 11840481 + 2059225 = 3441^2 + 1435^2 .

It is not an unprimeable number, because it can be changed into a prime (13899703) 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, 3474925 + ... + 3474928.

Almost surely, 2^13899706 is an apocalyptic number.

13899706 is a deficient number, since it is larger than the sum of its proper divisors (6949856).

13899706 is an equidigital number, since it uses as much as digits as its factorization.

13899706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6949855.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 13899706 is about 3728.2309477821. The cubic root of 13899706 is about 240.4373160863.

The spelling of 13899706 in words is "thirteen million, eight hundred ninety-nine thousand, seven hundred six".