6491579 has 4 divisors (see below), whose sum is σ = 6524400. Its totient is φ = 6458760.

The previous prime is 6491561. The next prime is 6491623. The reversal of 6491579 is 9751946.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6491579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6491549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16112 + ... + 16509.

It is an arithmetic number, because the mean of its divisors is an integer number (1631100).

Almost surely, 2^6491579 is an apocalyptic number.

6491579 is a deficient number, since it is larger than the sum of its proper divisors (32821).

6491579 is a wasteful number, since it uses less digits than its factorization.

6491579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32820.

The product of its digits is 68040, while the sum is 41.

The square root of 6491579 is about 2547.8577275821. The cubic root of 6491579 is about 186.5449294824.

The spelling of 6491579 in words is "six million, four hundred ninety-one thousand, five hundred seventy-nine".