12195389 has 2 divisors, whose sum is σ = 12195390. Its totient is φ = 12195388.

The previous prime is 12195373. The next prime is 12195401. The reversal of 12195389 is 98359121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9406489 + 2788900 = 3067^2 + 1670^2 .

It is a cyclic number.

It is not a de Polignac number, because 12195389 - 2⁴ = 12195373 is a prime.

It is a super-2 number, since 2×12195389² = 297455025722642, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12155389) 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 as a sum of consecutive naturals, namely, 6097694 + 6097695.

It is an arithmetic number, because the mean of its divisors is an integer number (6097695).

Almost surely, 2^12195389 is an apocalyptic number.

It is an amenable number.

12195389 is a deficient number, since it is larger than the sum of its proper divisors (1).

12195389 is an equidigital number, since it uses as much as digits as its factorization.

12195389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19440, while the sum is 38.

The square root of 12195389 is about 3492.1897142051. The cubic root of 12195389 is about 230.1787457389.

The spelling of 12195389 in words is "twelve million, one hundred ninety-five thousand, three hundred eighty-nine".