13173994 has 4 divisors (see below), whose sum is σ = 19760994. Its totient is φ = 6586996.

The previous prime is 13173991. The next prime is 13174001. The reversal of 13173994 is 49937131.

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., 9703225 + 3470769 = 3115^2 + 1863^2 .

It is not an unprimeable number, because it can be changed into a prime (13173991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3293497 + ... + 3293500.

Almost surely, 2^13173994 is an apocalyptic number.

13173994 is a deficient number, since it is larger than the sum of its proper divisors (6587000).

13173994 is an equidigital number, since it uses as much as digits as its factorization.

13173994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6586999.

The product of its digits is 20412, while the sum is 37.

The square root of 13173994 is about 3629.5997024465. The cubic root of 13173994 is about 236.1778440187.

The spelling of 13173994 in words is "thirteen million, one hundred seventy-three thousand, nine hundred ninety-four".