6499899 has 48 divisors (see below), whose sum is σ = 11901600. Its totient is φ = 3495744.

The previous prime is 6499897. The next prime is 6499903. The reversal of 6499899 is 9989946.

It is a happy number.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is not a de Polignac number, because 6499899 - 2¹ = 6499897 is a prime.

It is an Ulam number.

Its product of digits (1259712) is a multiple of the sum of its prime divisors (27).

It is not an unprimeable number, because it can be changed into a prime (6499897) 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 47 ways as a sum of consecutive naturals, for example, 382339 + ... + 382355.

It is an arithmetic number, because the mean of its divisors is an integer number (247950).

Almost surely, 2^6499899 is an apocalyptic number.

6499899 is a deficient number, since it is larger than the sum of its proper divisors (5401701).

6499899 is an equidigital number, since it uses as much as digits as its factorization.

6499899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74 (or 27 counting only the distinct ones).

The product of its digits is 1259712, while the sum is 54.

The square root of 6499899 is about 2549.4899489898. The cubic root of 6499899 is about 186.6245912112.

The spelling of 6499899 in words is "six million, four hundred ninety-nine thousand, eight hundred ninety-nine".