12191573 has 2 divisors, whose sum is σ = 12191574. Its totient is φ = 12191572.

The previous prime is 12191563. The next prime is 12191579. The reversal of 12191573 is 37519121.

12191573 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7360369 + 4831204 = 2713^2 + 2198^2 .

It is a cyclic number.

It is not a de Polignac number, because 12191573 - 2¹² = 12187477 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12191579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6095786 + 6095787.

It is an arithmetic number, because the mean of its divisors is an integer number (6095787).

Almost surely, 2^12191573 is an apocalyptic number.

It is an amenable number.

12191573 is a deficient number, since it is larger than the sum of its proper divisors (1).

12191573 is an equidigital number, since it uses as much as digits as its factorization.

12191573 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1890, while the sum is 29.

The square root of 12191573 is about 3491.6433093889. The cubic root of 12191573 is about 230.1547351962.

The spelling of 12191573 in words is "twelve million, one hundred ninety-one thousand, five hundred seventy-three".