6840869 has 8 divisors (see below), whose sum is σ = 7966080. Its totient is φ = 5752656.

The previous prime is 6840857. The next prime is 6840871. The reversal of 6840869 is 9680486.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-6840869 is a prime.

It is a super-2 number, since 2×6840869² = 93594977350322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6840469) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8849 + ... + 9590.

It is an arithmetic number, because the mean of its divisors is an integer number (995760).

Almost surely, 2^6840869 is an apocalyptic number.

It is an amenable number.

6840869 is a deficient number, since it is larger than the sum of its proper divisors (1125211).

6840869 is a wasteful number, since it uses less digits than its factorization.

6840869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18499.

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

The square root of 6840869 is about 2615.5054960753. The cubic root of 6840869 is about 189.8324376800.

The spelling of 6840869 in words is "six million, eight hundred forty thousand, eight hundred sixty-nine".