12911983 has 4 divisors (see below), whose sum is σ = 14756560. Its totient is φ = 11067408.

The previous prime is 12911957. The next prime is 12911999. The reversal of 12911983 is 38911921.

12911983 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.

It is a cyclic number.

It is not a de Polignac number, because 12911983 - 2⁹ = 12911471 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12911933) 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, 922278 + ... + 922291.

It is an arithmetic number, because the mean of its divisors is an integer number (3689140).

Almost surely, 2^12911983 is an apocalyptic number.

12911983 is a deficient number, since it is larger than the sum of its proper divisors (1844577).

12911983 is an equidigital number, since it uses as much as digits as its factorization.

12911983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1844576.

The product of its digits is 3888, while the sum is 34.

The square root of 12911983 is about 3593.3247835396. The cubic root of 12911983 is about 234.6016065641.

The spelling of 12911983 in words is "twelve million, nine hundred eleven thousand, nine hundred eighty-three".