6185198291 has 2 divisors, whose sum is σ = 6185198292. Its totient is φ = 6185198290.

The previous prime is 6185198251. The next prime is 6185198311. The reversal of 6185198291 is 1928915816.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6185198291 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (6185198221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3092599145 + 3092599146.

It is an arithmetic number, because the mean of its divisors is an integer number (3092599146).

Almost surely, 2^6185198291 is an apocalyptic number.

6185198291 is a deficient number, since it is larger than the sum of its proper divisors (1).

6185198291 is an equidigital number, since it uses as much as digits as its factorization.

6185198291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 311040, while the sum is 50.

The square root of 6185198291 is about 78646.0316290657. The cubic root of 6185198291 is about 1835.6274453002.

The spelling of 6185198291 in words is "six billion, one hundred eighty-five million, one hundred ninety-eight thousand, two hundred ninety-one".