6390191 has 4 divisors (see below), whose sum is σ = 6395400. Its totient is φ = 6384984.

The previous prime is 6390173. The next prime is 6390199. The reversal of 6390191 is 1910936.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 6390191 - 2⁶ = 6390127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6390199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 365 + ... + 3593.

It is an arithmetic number, because the mean of its divisors is an integer number (1598850).

Almost surely, 2^6390191 is an apocalyptic number.

6390191 is a deficient number, since it is larger than the sum of its proper divisors (5209).

6390191 is a wasteful number, since it uses less digits than its factorization.

6390191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5208.

The product of its (nonzero) digits is 1458, while the sum is 29.

The square root of 6390191 is about 2527.8827108867. The cubic root of 6390191 is about 185.5686520425.

The spelling of 6390191 in words is "six million, three hundred ninety thousand, one hundred ninety-one".