6709785309 has 16 divisors (see below), whose sum is σ = 9944955840. Its totient is φ = 4471150320.

The previous prime is 6709785307. The next prime is 6709785337. The reversal of 6709785309 is 9035879076.

It is not a de Polignac number, because 6709785309 - 2¹ = 6709785307 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6709785307) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4854 + ... + 115944.

It is an arithmetic number, because the mean of its divisors is an integer number (621559740).

Almost surely, 2^6709785309 is an apocalyptic number.

It is an amenable number.

6709785309 is a deficient number, since it is larger than the sum of its proper divisors (3235170531).

6709785309 is a wasteful number, since it uses less digits than its factorization.

6709785309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113337 (or 113331 counting only the distinct ones).

The product of its (nonzero) digits is 2857680, while the sum is 54.

The square root of 6709785309 is about 81913.2791981862. The cubic root of 6709785309 is about 1886.1209607033.

The spelling of 6709785309 in words is "six billion, seven hundred nine million, seven hundred eighty-five thousand, three hundred nine".