6840697 has 4 divisors (see below), whose sum is σ = 6848640. Its totient is φ = 6832756.

The previous prime is 6840661. The next prime is 6840721. The reversal of 6840697 is 7960486.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6840697 is a prime.

It is a Duffinian number.

6840697 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6840497) 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 3 ways as a sum of consecutive naturals, for example, 2497 + ... + 4462.

It is an arithmetic number, because the mean of its divisors is an integer number (1712160).

Almost surely, 2^6840697 is an apocalyptic number.

It is an amenable number.

6840697 is a deficient number, since it is larger than the sum of its proper divisors (7943).

6840697 is an equidigital number, since it uses as much as digits as its factorization.

6840697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7942.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 6840697 is about 2615.4726150354. The cubic root of 6840697 is about 189.8308466807.

The spelling of 6840697 in words is "six million, eight hundred forty thousand, six hundred ninety-seven".