6869991 has 8 divisors (see below), whose sum is σ = 9195120. Its totient is φ = 4562432.

The previous prime is 6869987. The next prime is 6870011. The reversal of 6869991 is 1999686.

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

It is a cyclic number.

It is not a de Polignac number, because 6869991 - 2² = 6869987 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6869991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6862991) 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, 3450 + ... + 5063.

It is an arithmetic number, because the mean of its divisors is an integer number (1149390).

Almost surely, 2^6869991 is an apocalyptic number.

6869991 is a deficient number, since it is larger than the sum of its proper divisors (2325129).

6869991 is a wasteful number, since it uses less digits than its factorization.

6869991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8785.

The product of its digits is 209952, while the sum is 48.

The square root of 6869991 is about 2621.0667675586. The cubic root of 6869991 is about 190.1014324514.

The spelling of 6869991 in words is "six million, eight hundred sixty-nine thousand, nine hundred ninety-one".