6909661739 has 8 divisors (see below), whose sum is σ = 6921484080. Its totient is φ = 6897852000.

The previous prime is 6909661729. The next prime is 6909661751. The reversal of 6909661739 is 9371669096.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6909661739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6909661729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1990097 + ... + 1993565.

It is an arithmetic number, because the mean of its divisors is an integer number (865185510).

Almost surely, 2^6909661739 is an apocalyptic number.

6909661739 is a deficient number, since it is larger than the sum of its proper divisors (11822341).

6909661739 is a wasteful number, since it uses less digits than its factorization.

6909661739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6301.

The product of its (nonzero) digits is 3306744, while the sum is 56.

The square root of 6909661739 is about 83124.3751194558. The cubic root of 6909661739 is about 1904.6664373271. Note that the first 3 decimals are identical.

The spelling of 6909661739 in words is "six billion, nine hundred nine million, six hundred sixty-one thousand, seven hundred thirty-nine".