6840731 has 8 divisors (see below), whose sum is σ = 6985440. Its totient is φ = 6697728.

The previous prime is 6840721. The next prime is 6840737. The reversal of 6840731 is 1370486.

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 6840731 - 2¹⁸ = 6578587 is a prime.

It is a super-2 number, since 2×6840731² = 93591201228722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6840694 and 6840703.

It is not an unprimeable number, because it can be changed into a prime (6840737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10250 + ... + 10896.

It is an arithmetic number, because the mean of its divisors is an integer number (873180).

Almost surely, 2^6840731 is an apocalyptic number.

6840731 is a deficient number, since it is larger than the sum of its proper divisors (144709).

6840731 is a wasteful number, since it uses less digits than its factorization.

6840731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 853.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 6840731 is about 2615.4791148086. The cubic root of 6840731 is about 189.8311611827.

The spelling of 6840731 in words is "six million, eight hundred forty thousand, seven hundred thirty-one".