6509887 has 4 divisors (see below), whose sum is σ = 6542800. Its totient is φ = 6476976.

The previous prime is 6509873. The next prime is 6509903. The reversal of 6509887 is 7889056.

It is a happy number.

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-6509887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6509387) 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, 16158 + ... + 16555.

It is an arithmetic number, because the mean of its divisors is an integer number (1635700).

Almost surely, 2^6509887 is an apocalyptic number.

6509887 is a deficient number, since it is larger than the sum of its proper divisors (32913).

6509887 is a wasteful number, since it uses less digits than its factorization.

6509887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32912.

The product of its (nonzero) digits is 120960, while the sum is 43.

The square root of 6509887 is about 2551.4480202426. The cubic root of 6509887 is about 186.7201338477.

It can be divided in two parts, 6509 and 887, that added together give a square (7396 = 86²).

The spelling of 6509887 in words is "six million, five hundred nine thousand, eight hundred eighty-seven".