12135983 has 4 divisors (see below), whose sum is σ = 12142968. Its totient is φ = 12129000.

The previous prime is 12135979. The next prime is 12135997. The reversal of 12135983 is 38953121.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 12135983 - 2² = 12135979 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12135913) 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, 1385 + ... + 5117.

It is an arithmetic number, because the mean of its divisors is an integer number (3035742).

Almost surely, 2^12135983 is an apocalyptic number.

12135983 is a deficient number, since it is larger than the sum of its proper divisors (6985).

12135983 is an equidigital number, since it uses as much as digits as its factorization.

12135983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6984.

The product of its digits is 6480, while the sum is 32.

The square root of 12135983 is about 3483.6737792164. The cubic root of 12135983 is about 229.8043894498.

The spelling of 12135983 in words is "twelve million, one hundred thirty-five thousand, nine hundred eighty-three".