12999169 has 4 divisors (see below), whose sum is σ = 13763844. Its totient is φ = 12234496.

The previous prime is 12999157. The next prime is 12999179. The reversal of 12999169 is 96199921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 96199921 = 2647 ⋅36343.

It can be written as a sum of positive squares in 2 ways, for example, as 4355569 + 8643600 = 2087^2 + 2940^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12999169 is a prime.

It is a super-2 number, since 2×12999169² = 337956789381122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12999149) 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, 382312 + ... + 382345.

It is an arithmetic number, because the mean of its divisors is an integer number (3440961).

Almost surely, 2^12999169 is an apocalyptic number.

It is an amenable number.

12999169 is a deficient number, since it is larger than the sum of its proper divisors (764675).

12999169 is an equidigital number, since it uses as much as digits as its factorization.

12999169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 764674.

The product of its digits is 78732, while the sum is 46.

The square root of 12999169 is about 3605.4360346566. The cubic root of 12999169 is about 235.1284585137.

The spelling of 12999169 in words is "twelve million, nine hundred ninety-nine thousand, one hundred sixty-nine".