6913309 has 4 divisors (see below), whose sum is σ = 7445116. Its totient is φ = 6381504.

The previous prime is 6913301. The next prime is 6913331. The reversal of 6913309 is 9033196.

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

It can be written as a sum of positive squares in 2 ways, for example, as 334084 + 6579225 = 578^2 + 2565^2 .

It is a cyclic number.

It is not a de Polignac number, because 6913309 - 2³ = 6913301 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 (6913301) 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, 265884 + ... + 265909.

It is an arithmetic number, because the mean of its divisors is an integer number (1861279).

Almost surely, 2^6913309 is an apocalyptic number.

It is an amenable number.

6913309 is a deficient number, since it is larger than the sum of its proper divisors (531807).

6913309 is a wasteful number, since it uses less digits than its factorization.

6913309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 531806.

The product of its (nonzero) digits is 4374, while the sum is 31.

The square root of 6913309 is about 2629.3172117491. The cubic root of 6913309 is about 190.5001504076.

The spelling of 6913309 in words is "six million, nine hundred thirteen thousand, three hundred nine".