3198121187 has 2 divisors, whose sum is σ = 3198121188. Its totient is φ = 3198121186.

The previous prime is 3198121183. The next prime is 3198121193. The reversal of 3198121187 is 7811218913.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3198121187 - 2² = 3198121183 is a prime.

It is not a weakly prime, because it can be changed into another prime (3198121183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1599060593 + 1599060594.

It is an arithmetic number, because the mean of its divisors is an integer number (1599060594).

Almost surely, 2^3198121187 is an apocalyptic number.

3198121187 is a deficient number, since it is larger than the sum of its proper divisors (1).

3198121187 is an equidigital number, since it uses as much as digits as its factorization.

3198121187 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 41.

The square root of 3198121187 is about 56551.9335390047. The cubic root of 3198121187 is about 1473.3241427337.

The spelling of 3198121187 in words is "three billion, one hundred ninety-eight million, one hundred twenty-one thousand, one hundred eighty-seven".