6840069 has 16 divisors (see below), whose sum is σ = 9797760. Its totient is φ = 4229120.

The previous prime is 6840061. The next prime is 6840073. The reversal of 6840069 is 9600486.

It is a cyclic number.

It is not a de Polignac number, because 6840069 - 2³ = 6840061 is a prime.

It is a super-2 number, since 2×6840069² = 93573087849522, which contains 22 as substring.

6840069 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6840061) 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 15 ways as a sum of consecutive naturals, for example, 2677 + ... + 4565.

It is an arithmetic number, because the mean of its divisors is an integer number (612360).

Almost surely, 2^6840069 is an apocalyptic number.

It is an amenable number.

6840069 is a deficient number, since it is larger than the sum of its proper divisors (2957691).

6840069 is a wasteful number, since it uses less digits than its factorization.

6840069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1980.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 6840069 is about 2615.3525574958. The cubic root of 6840069 is about 189.8250374569.

The spelling of 6840069 in words is "six million, eight hundred forty thousand, sixty-nine".