12187098523 has 2 divisors, whose sum is σ = 12187098524. Its totient is φ = 12187098522.

The previous prime is 12187098509. The next prime is 12187098557. The reversal of 12187098523 is 32589078121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12187098523 - 2³³ = 3597163931 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (12187098323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6093549261 + 6093549262.

It is an arithmetic number, because the mean of its divisors is an integer number (6093549262).

Almost surely, 2^12187098523 is an apocalyptic number.

12187098523 is a deficient number, since it is larger than the sum of its proper divisors (1).

12187098523 is an equidigital number, since it uses as much as digits as its factorization.

12187098523 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 241920, while the sum is 46.

The spelling of 12187098523 in words is "twelve billion, one hundred eighty-seven million, ninety-eight thousand, five hundred twenty-three".