13437994 has 4 divisors (see below), whose sum is σ = 20156994. Its totient is φ = 6718996.

The previous prime is 13437971. The next prime is 13438001. The reversal of 13437994 is 49973431.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 49973431 = 191 ⋅261641.

It can be written as a sum of positive squares in only one way, i.e., 12145225 + 1292769 = 3485^2 + 1137^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3359497 + ... + 3359500.

Almost surely, 2^13437994 is an apocalyptic number.

13437994 is a deficient number, since it is larger than the sum of its proper divisors (6719000).

13437994 is an equidigital number, since it uses as much as digits as its factorization.

13437994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6718999.

The product of its digits is 81648, while the sum is 40.

The square root of 13437994 is about 3665.7869550753. The cubic root of 13437994 is about 237.7450486455.

The spelling of 13437994 in words is "thirteen million, four hundred thirty-seven thousand, nine hundred ninety-four".