11987023 has 4 divisors (see below), whose sum is σ = 12692160. Its totient is φ = 11281888.

The previous prime is 11987011. The next prime is 11987029. The reversal of 11987023 is 32078911.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11987023 - 2⁵ = 11986991 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11987029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 352543 + ... + 352576.

It is an arithmetic number, because the mean of its divisors is an integer number (3173040).

Almost surely, 2^11987023 is an apocalyptic number.

11987023 is a deficient number, since it is larger than the sum of its proper divisors (705137).

11987023 is an equidigital number, since it uses as much as digits as its factorization.

11987023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 705136.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 11987023 is about 3462.2280398610. The cubic root of 11987023 is about 228.8602912065.

The spelling of 11987023 in words is "eleven million, nine hundred eighty-seven thousand, twenty-three".