12191233 has 2 divisors, whose sum is σ = 12191234. Its totient is φ = 12191232.

The previous prime is 12191213. The next prime is 12191239. The reversal of 12191233 is 33219121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10909809 + 1281424 = 3303^2 + 1132^2 .

It is a cyclic number.

It is not a de Polignac number, because 12191233 - 2¹⁷ = 12060161 is a prime.

It is not a weakly prime, because it can be changed into another prime (12191239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6095616 + 6095617.

It is an arithmetic number, because the mean of its divisors is an integer number (6095617).

Almost surely, 2^12191233 is an apocalyptic number.

It is an amenable number.

12191233 is a deficient number, since it is larger than the sum of its proper divisors (1).

12191233 is an equidigital number, since it uses as much as digits as its factorization.

12191233 is an evil number, because the sum of its binary digits is even.

The product of its digits is 324, while the sum is 22.

The square root of 12191233 is about 3491.5946213729. The cubic root of 12191233 is about 230.1525956490.

The spelling of 12191233 in words is "twelve million, one hundred ninety-one thousand, two hundred thirty-three".