12694189 has 16 divisors (see below), whose sum is σ = 13954032. Its totient is φ = 11501568.

The previous prime is 12694169. The next prime is 12694207. The reversal of 12694189 is 98149621.

12694189 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 324900 + 12369289 = 570^2 + 3517^2 .

It is a 8-Lehmer number, since φ(12694189) divides (12694189-1)⁸.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12694189 is a prime.

It is a super-2 number, since 2×12694189² = 322284868735442, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12694169) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65677 + ... + 65869.

It is an arithmetic number, because the mean of its divisors is an integer number (872127).

Almost surely, 2^12694189 is an apocalyptic number.

It is an amenable number.

12694189 is a deficient number, since it is larger than the sum of its proper divisors (1259843).

12694189 is a wasteful number, since it uses less digits than its factorization.

12694189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336.

The product of its digits is 31104, while the sum is 40.

The square root of 12694189 is about 3562.8905399970. The cubic root of 12694189 is about 233.2750654960.

The spelling of 12694189 in words is "twelve million, six hundred ninety-four thousand, one hundred eighty-nine".