11993558 has 4 divisors (see below), whose sum is σ = 17990340. Its totient is φ = 5996778.

The previous prime is 11993549. The next prime is 11993561. The reversal of 11993558 is 85539911.

11993558 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 85539911 = 59 ⋅1449829.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2998388 + ... + 2998391.

It is an arithmetic number, because the mean of its divisors is an integer number (4497585).

Almost surely, 2^11993558 is an apocalyptic number.

11993558 is a deficient number, since it is larger than the sum of its proper divisors (5996782).

11993558 is an equidigital number, since it uses as much as digits as its factorization.

11993558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5996781.

The product of its digits is 48600, while the sum is 41.

The square root of 11993558 is about 3463.1716677058. The cubic root of 11993558 is about 228.9018731266.

The spelling of 11993558 in words is "eleven million, nine hundred ninety-three thousand, five hundred fifty-eight".