6860509 has 4 divisors (see below), whose sum is σ = 7158816. Its totient is φ = 6562204.

The previous prime is 6860473. The next prime is 6860551. The reversal of 6860509 is 9050686.

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 6860509 - 2¹⁹ = 6336221 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 (6863509) 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, 149119 + ... + 149164.

It is an arithmetic number, because the mean of its divisors is an integer number (1789704).

Almost surely, 2^6860509 is an apocalyptic number.

It is an amenable number.

6860509 is a deficient number, since it is larger than the sum of its proper divisors (298307).

6860509 is a wasteful number, since it uses less digits than its factorization.

6860509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298306.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 6860509 is about 2619.2573374909. The cubic root of 6860509 is about 190.0139324963.

The spelling of 6860509 in words is "six million, eight hundred sixty thousand, five hundred nine".