6940009647 has 6 divisors (see below), whose sum is σ = 10024458392. Its totient is φ = 4626673092.

The previous prime is 6940009591. The next prime is 6940009669. The reversal of 6940009647 is 7469000496.

It is a de Polignac number, because none of the positive numbers 2^k-6940009647 is a prime.

It is a super-3 number, since 3×6940009647³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6940009847) 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 5 ways as a sum of consecutive naturals, for example, 385556083 + ... + 385556100.

Almost surely, 2^6940009647 is an apocalyptic number.

6940009647 is a deficient number, since it is larger than the sum of its proper divisors (3084448745).

6940009647 is a wasteful number, since it uses less digits than its factorization.

6940009647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 771112189 (or 771112186 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The square root of 6940009647 is about 83306.7202991451. The cubic root of 6940009647 is about 1907.4508583756.

The spelling of 6940009647 in words is "six billion, nine hundred forty million, nine thousand, six hundred forty-seven".