12193591 has 2 divisors, whose sum is σ = 12193592. Its totient is φ = 12193590.

The previous prime is 12193583. The next prime is 12193603. The reversal of 12193591 is 19539121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12193591 - 2³ = 12193583 is a prime.

It is a super-2 number, since 2×12193591² = 297367322950562, 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 (12193561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6096795 + 6096796.

It is an arithmetic number, because the mean of its divisors is an integer number (6096796).

Almost surely, 2^12193591 is an apocalyptic number.

12193591 is a deficient number, since it is larger than the sum of its proper divisors (1).

12193591 is an equidigital number, since it uses as much as digits as its factorization.

12193591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2430, while the sum is 31.

The square root of 12193591 is about 3491.9322731118. The cubic root of 12193591 is about 230.1674332195.

The spelling of 12193591 in words is "twelve million, one hundred ninety-three thousand, five hundred ninety-one".