12063991 has 4 divisors (see below), whose sum is σ = 12453184. Its totient is φ = 11674800.

The previous prime is 12063901. The next prime is 12064009. The reversal of 12063991 is 19936021.

12063991 is digitally balanced in base 3, 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.

It is a cyclic number.

It is not a de Polignac number, because 12063991 - 2¹⁷ = 11932919 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 389161 = 12063991 / (1 + 2 + 0 + 6 + 3 + 9 + 9 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12063901) 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 in 3 ways as a sum of consecutive naturals, for example, 194550 + ... + 194611.

It is an arithmetic number, because the mean of its divisors is an integer number (3113296).

Almost surely, 2^12063991 is an apocalyptic number.

12063991 is a deficient number, since it is larger than the sum of its proper divisors (389193).

12063991 is an equidigital number, since it uses as much as digits as its factorization.

12063991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389192.

The product of its (nonzero) digits is 2916, while the sum is 31.

The square root of 12063991 is about 3473.3256397867. The cubic root of 12063991 is about 229.3490795499.

The spelling of 12063991 in words is "twelve million, sixty-three thousand, nine hundred ninety-one".