6840986 has 4 divisors (see below), whose sum is σ = 10261482. Its totient is φ = 3420492.

The previous prime is 6840983. The next prime is 6840989. The reversal of 6840986 is 6890486.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (6840983) and next prime (6840989).

It can be written as a sum of positive squares in only one way, i.e., 5909761 + 931225 = 2431^2 + 965^2 .

It is not an unprimeable number, because it can be changed into a prime (6840983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1710245 + ... + 1710248.

Almost surely, 2^6840986 is an apocalyptic number.

6840986 is a deficient number, since it is larger than the sum of its proper divisors (3420496).

6840986 is a wasteful number, since it uses less digits than its factorization.

6840986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3420495.

The product of its (nonzero) digits is 82944, while the sum is 41.

The square root of 6840986 is about 2615.5278625929. The cubic root of 6840986 is about 189.8335199142.

The spelling of 6840986 in words is "six million, eight hundred forty thousand, nine hundred eighty-six".