6909239 has 4 divisors (see below), whose sum is σ = 7039656. Its totient is φ = 6778824.

The previous prime is 6909173. The next prime is 6909247. The reversal of 6909239 is 9329096.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6909239 - 2⁸ = 6908983 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 (6909289) 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, 65129 + ... + 65234.

It is an arithmetic number, because the mean of its divisors is an integer number (1759914).

Almost surely, 2^6909239 is an apocalyptic number.

6909239 is a deficient number, since it is larger than the sum of its proper divisors (130417).

6909239 is a wasteful number, since it uses less digits than its factorization.

6909239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130416.

The product of its (nonzero) digits is 26244, while the sum is 38.

The square root of 6909239 is about 2628.5431326117. The cubic root of 6909239 is about 190.4627593496.

The spelling of 6909239 in words is "six million, nine hundred nine thousand, two hundred thirty-nine".