12900191 has 2 divisors, whose sum is σ = 12900192. Its totient is φ = 12900190.

The previous prime is 12900149. The next prime is 12900197. The reversal of 12900191 is 19100921.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12900191 - 2¹⁰ = 12899167 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12900197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6450095 + 6450096.

It is an arithmetic number, because the mean of its divisors is an integer number (6450096).

Almost surely, 2^12900191 is an apocalyptic number.

12900191 is a deficient number, since it is larger than the sum of its proper divisors (1).

12900191 is an equidigital number, since it uses as much as digits as its factorization.

12900191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162, while the sum is 23.

The square root of 12900191 is about 3591.6835885139. The cubic root of 12900191 is about 234.5301673766.

The spelling of 12900191 in words is "twelve million, nine hundred thousand, one hundred ninety-one".