11998606 has 4 divisors (see below), whose sum is σ = 17997912. Its totient is φ = 5999302.

The previous prime is 11998601. The next prime is 11998607. The reversal of 11998606 is 60689911.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60689911 = 1949 ⋅31139.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11998601) by changing a digit.

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, 2999650 + ... + 2999653.

It is an arithmetic number, because the mean of its divisors is an integer number (4499478).

Almost surely, 2^11998606 is an apocalyptic number.

11998606 is a deficient number, since it is larger than the sum of its proper divisors (5999306).

11998606 is an equidigital number, since it uses as much as digits as its factorization.

11998606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5999305.

The product of its (nonzero) digits is 23328, while the sum is 40.

The square root of 11998606 is about 3463.9004027252. The cubic root of 11998606 is about 228.9339829915.

The spelling of 11998606 in words is "eleven million, nine hundred ninety-eight thousand, six hundred six".