6840769 has 4 divisors (see below), whose sum is σ = 7366996. Its totient is φ = 6314544.

The previous prime is 6840761. The next prime is 6840793. The reversal of 6840769 is 9670486.

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

It can be written as a sum of positive squares in 2 ways, for example, as 774400 + 6066369 = 880^2 + 2463^2 .

It is a cyclic number.

It is not a de Polignac number, because 6840769 - 2³ = 6840761 is a prime.

It is a super-2 number, since 2×6840769² = 93592241022722, which contains 22 as substring.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (6840761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 263094 + ... + 263119.

It is an arithmetic number, because the mean of its divisors is an integer number (1841749).

Almost surely, 2^6840769 is an apocalyptic number.

It is an amenable number.

6840769 is a deficient number, since it is larger than the sum of its proper divisors (526227).

6840769 is a wasteful number, since it uses less digits than its factorization.

6840769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526226.

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

The square root of 6840769 is about 2615.4863792419. The cubic root of 6840769 is about 189.8315126836.

The spelling of 6840769 in words is "six million, eight hundred forty thousand, seven hundred sixty-nine".