13558994 has 4 divisors (see below), whose sum is σ = 20338494. Its totient is φ = 6779496.

The previous prime is 13558981. The next prime is 13559003. The reversal of 13558994 is 49985531.

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: 49985531 = 29 ⋅1723639.

It can be written as a sum of positive squares in only one way, i.e., 10272025 + 3286969 = 3205^2 + 1813^2 .

It is an unprimeable number.

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, 3389747 + ... + 3389750.

Almost surely, 2^13558994 is an apocalyptic number.

13558994 is a deficient number, since it is larger than the sum of its proper divisors (6779500).

13558994 is an equidigital number, since it uses as much as digits as its factorization.

13558994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6779499.

The product of its digits is 194400, while the sum is 44.

The square root of 13558994 is about 3682.2539293210. The cubic root of 13558994 is about 238.4564950453.

The spelling of 13558994 in words is "thirteen million, five hundred fifty-eight thousand, nine hundred ninety-four".