6398791 has 8 divisors (see below), whose sum is σ = 7345184. Its totient is φ = 5460480.

The previous prime is 6398789. The next prime is 6398797. The reversal of 6398791 is 1978936.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6398791 - 2¹ = 6398789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6398797) 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 7 ways as a sum of consecutive naturals, for example, 210 + ... + 3583.

It is an arithmetic number, because the mean of its divisors is an integer number (918148).

Almost surely, 2^6398791 is an apocalyptic number.

6398791 is a deficient number, since it is larger than the sum of its proper divisors (946393).

6398791 is a wasteful number, since it uses less digits than its factorization.

6398791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4041.

The product of its digits is 81648, while the sum is 43.

The square root of 6398791 is about 2529.5831672432. The cubic root of 6398791 is about 185.6518616064.

The spelling of 6398791 in words is "six million, three hundred ninety-eight thousand, seven hundred ninety-one".