6198391 has 2 divisors, whose sum is σ = 6198392. Its totient is φ = 6198390.

The previous prime is 6198377. The next prime is 6198443. The reversal of 6198391 is 1938916.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6198391 - 2⁵ = 6198359 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6198391.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6198331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3099195 + 3099196.

It is an arithmetic number, because the mean of its divisors is an integer number (3099196).

Almost surely, 2^6198391 is an apocalyptic number.

6198391 is a deficient number, since it is larger than the sum of its proper divisors (1).

6198391 is an equidigital number, since it uses as much as digits as its factorization.

6198391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11664, while the sum is 37.

The square root of 6198391 is about 2489.6568036579. The cubic root of 6198391 is about 183.6931618056.

The spelling of 6198391 in words is "six million, one hundred ninety-eight thousand, three hundred ninety-one".