6493999387 has 4 divisors (see below), whose sum is σ = 6507334576. Its totient is φ = 6480664200.

The previous prime is 6493999367. The next prime is 6493999399. The reversal of 6493999387 is 7839993946.

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-6493999387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6493999327) 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, 6666864 + ... + 6667837.

It is an arithmetic number, because the mean of its divisors is an integer number (1626833644).

Almost surely, 2^6493999387 is an apocalyptic number.

6493999387 is a deficient number, since it is larger than the sum of its proper divisors (13335189).

6493999387 is a wasteful number, since it uses less digits than its factorization.

6493999387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13335188.

The product of its digits is 79361856, while the sum is 67.

The square root of 6493999387 is about 80585.3546682026. The cubic root of 6493999387 is about 1865.6811104418.

The spelling of 6493999387 in words is "six billion, four hundred ninety-three million, nine hundred ninety-nine thousand, three hundred eighty-seven".