6491189 has 2 divisors, whose sum is σ = 6491190. Its totient is φ = 6491188.

The previous prime is 6491167. The next prime is 6491207. The reversal of 6491189 is 9811946.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4622500 + 1868689 = 2150^2 + 1367^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6491189 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6491119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3245594 + 3245595.

It is an arithmetic number, because the mean of its divisors is an integer number (3245595).

Almost surely, 2^6491189 is an apocalyptic number.

It is an amenable number.

6491189 is a deficient number, since it is larger than the sum of its proper divisors (1).

6491189 is an equidigital number, since it uses as much as digits as its factorization.

6491189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 38.

The square root of 6491189 is about 2547.7811915469. The cubic root of 6491189 is about 186.5411936692.

The spelling of 6491189 in words is "six million, four hundred ninety-one thousand, one hundred eighty-nine".