6840005731 has 8 divisors (see below), whose sum is σ = 7442101184. Its totient is φ = 6248759040.

The previous prime is 6840005693. The next prime is 6840005749. The reversal of 6840005731 is 1375000486.

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

It is a cyclic number.

It is not a de Polignac number, because 6840005731 - 2²⁷ = 6705788003 is a prime.

It is a super-2 number, since 2×6840005731² = 93571356800225688722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6840005791) 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, 2710875 + ... + 2713396.

It is an arithmetic number, because the mean of its divisors is an integer number (930262648).

Almost surely, 2^6840005731 is an apocalyptic number.

6840005731 is a deficient number, since it is larger than the sum of its proper divisors (602095453).

6840005731 is a wasteful number, since it uses less digits than its factorization.

6840005731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5424381.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 6840005731 is about 82704.3271600707. The cubic root of 6840005731 is about 1898.2445217634.

The spelling of 6840005731 in words is "six billion, eight hundred forty million, five thousand, seven hundred thirty-one".