13891994 has 8 divisors (see below), whose sum is σ = 21022740. Its totient is φ = 6884416.

The previous prime is 13891993. The next prime is 13892017. The reversal of 13891994 is 49919831.

It can be written as a sum of positive squares in 2 ways, for example, as 13786369 + 105625 = 3713^2 + 325^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (13891993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30509 + ... + 30960.

Almost surely, 2^13891994 is an apocalyptic number.

13891994 is a deficient number, since it is larger than the sum of its proper divisors (7130746).

13891994 is a wasteful number, since it uses less digits than its factorization.

13891994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61584.

The product of its digits is 69984, while the sum is 44.

The square root of 13891994 is about 3727.1965335893. The cubic root of 13891994 is about 240.3928404304.

The spelling of 13891994 in words is "thirteen million, eight hundred ninety-one thousand, nine hundred ninety-four".