6487449209 has 4 divisors (see below), whose sum is σ = 6493086720. Its totient is φ = 6481811700.

The previous prime is 6487449197. The next prime is 6487449211. The reversal of 6487449209 is 9029447846.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6487449209 - 2²⁴ = 6470671993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6487449239) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2817029 + ... + 2819330.

It is an arithmetic number, because the mean of its divisors is an integer number (1623271680).

Almost surely, 2^6487449209 is an apocalyptic number.

It is an amenable number.

6487449209 is a deficient number, since it is larger than the sum of its proper divisors (5637511).

6487449209 is a wasteful number, since it uses less digits than its factorization.

6487449209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5637510.

The product of its (nonzero) digits is 3483648, while the sum is 53.

The square root of 6487449209 is about 80544.7031715929. The cubic root of 6487449209 is about 1865.0536258111.

The spelling of 6487449209 in words is "six billion, four hundred eighty-seven million, four hundred forty-nine thousand, two hundred nine".