12163913 has 4 divisors (see below), whose sum is σ = 12245700. Its totient is φ = 12082128.

The previous prime is 12163843. The next prime is 12163937. The reversal of 12163913 is 31936121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4721929 + 7441984 = 2173^2 + 2728^2 .

It is a cyclic number.

It is not a de Polignac number, because 12163913 - 2¹⁴ = 12147529 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12163973) 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, 40670 + ... + 40967.

It is an arithmetic number, because the mean of its divisors is an integer number (3061425).

Almost surely, 2^12163913 is an apocalyptic number.

It is an amenable number.

12163913 is a deficient number, since it is larger than the sum of its proper divisors (81787).

12163913 is an equidigital number, since it uses as much as digits as its factorization.

12163913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81786.

The product of its digits is 972, while the sum is 26.

The square root of 12163913 is about 3487.6801745573. The cubic root of 12163913 is about 229.9805465588.

The spelling of 12163913 in words is "twelve million, one hundred sixty-three thousand, nine hundred thirteen".