6409867 has 4 divisors (see below), whose sum is σ = 6786936. Its totient is φ = 6032800.

The previous prime is 6409849. The next prime is 6409883. The reversal of 6409867 is 7689046.

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-6409867 is a prime.

It is a Duffinian number.

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6409807) 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, 188509 + ... + 188542.

It is an arithmetic number, because the mean of its divisors is an integer number (1696734).

Almost surely, 2^6409867 is an apocalyptic number.

6409867 is a deficient number, since it is larger than the sum of its proper divisors (377069).

6409867 is a wasteful number, since it uses less digits than its factorization.

6409867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377068.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 6409867 is about 2531.7715141774. The cubic root of 6409867 is about 185.7589180133.

The spelling of 6409867 in words is "six million, four hundred nine thousand, eight hundred sixty-seven".