6499987 has 12 divisors (see below), whose sum is σ = 7283136. Its totient is φ = 5760720.

The previous prime is 6499949. The next prime is 6499991. The reversal of 6499987 is 7899946.

It is not a de Polignac number, because 6499987 - 2⁷ = 6499859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6499187) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51118 + ... + 51244.

It is an arithmetic number, because the mean of its divisors is an integer number (606928).

Almost surely, 2^6499987 is an apocalyptic number.

6499987 is a deficient number, since it is larger than the sum of its proper divisors (783149).

6499987 is a wasteful number, since it uses less digits than its factorization.

6499987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298 (or 171 counting only the distinct ones).

The product of its digits is 979776, while the sum is 52.

The square root of 6499987 is about 2549.5072072854. The cubic root of 6499987 is about 186.6254334237.

The spelling of 6499987 in words is "six million, four hundred ninety-nine thousand, nine hundred eighty-seven".