13999994 has 4 divisors (see below), whose sum is σ = 20999994. Its totient is φ = 6999996.

The previous prime is 13999981. The next prime is 14000029. The reversal of 13999994 is 49999931.

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., 13213225 + 786769 = 3635^2 + 887^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3499997 + ... + 3500000.

Almost surely, 2^13999994 is an apocalyptic number.

13999994 is a deficient number, since it is larger than the sum of its proper divisors (7000000).

13999994 is an equidigital number, since it uses as much as digits as its factorization.

13999994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6999999.

The product of its digits is 708588, while the sum is 53.

The square root of 13999994 is about 3741.6565849901. The cubic root of 13999994 is about 241.0141919869.

The spelling of 13999994 in words is "thirteen million, nine hundred ninety-nine thousand, nine hundred ninety-four".