6349991 has 6 divisors (see below), whose sum is σ = 6415920. Its totient is φ = 6284628.

The previous prime is 6349969. The next prime is 6349997. The reversal of 6349991 is 1999436.

It is a de Polignac number, because none of the positive numbers 2^k-6349991 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 (6349997) 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 5 ways as a sum of consecutive naturals, for example, 26450 + ... + 26688.

It is an arithmetic number, because the mean of its divisors is an integer number (1069320).

Almost surely, 2^6349991 is an apocalyptic number.

6349991 is a deficient number, since it is larger than the sum of its proper divisors (65929).

6349991 is an equidigital number, since it uses as much as digits as its factorization.

6349991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 565 (or 402 counting only the distinct ones).

The product of its digits is 52488, while the sum is 41.

The square root of 6349991 is about 2519.9188478997. The cubic root of 6349991 is about 185.1787024165.

The spelling of 6349991 in words is "six million, three hundred forty-nine thousand, nine hundred ninety-one".