12169931 has 4 divisors (see below), whose sum is σ = 12177000. Its totient is φ = 12162864.

The previous prime is 12169891. The next prime is 12169933. The reversal of 12169931 is 13996121.

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, and also an emirpimes, since its reverse is a distinct semiprime: 13996121 = 23 ⋅608527.

It is a cyclic number.

It is not a de Polignac number, because 12169931 - 2¹⁰ = 12168907 is a prime.

It is a super-2 number, since 2×12169931² = 296214441089522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12169933) 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, 920 + ... + 5018.

It is an arithmetic number, because the mean of its divisors is an integer number (3044250).

Almost surely, 2^12169931 is an apocalyptic number.

12169931 is a deficient number, since it is larger than the sum of its proper divisors (7069).

12169931 is an equidigital number, since it uses as much as digits as its factorization.

12169931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7068.

The product of its digits is 2916, while the sum is 32.

The square root of 12169931 is about 3488.5428190005. The cubic root of 12169931 is about 230.0184673262.

The spelling of 12169931 in words is "twelve million, one hundred sixty-nine thousand, nine hundred thirty-one".