6870399 has 8 divisors (see below), whose sum is σ = 9558912. Its totient is φ = 4381080.

The previous prime is 6870389. The next prime is 6870401. The reversal of 6870399 is 9930786.

It is a happy number.

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

It is not a de Polignac number, because 6870399 - 2¹⁵ = 6837631 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6870399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6870389) 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, 49717 + ... + 49854.

It is an arithmetic number, because the mean of its divisors is an integer number (1194864).

Almost surely, 2^6870399 is an apocalyptic number.

6870399 is a gapful number since it is divisible by the number (69) formed by its first and last digit.

6870399 is a deficient number, since it is larger than the sum of its proper divisors (2688513).

6870399 is a wasteful number, since it uses less digits than its factorization.

6870399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99597.

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 6870399 is about 2621.1445973086. The cubic root of 6870399 is about 190.1051956708.

The spelling of 6870399 in words is "six million, eight hundred seventy thousand, three hundred ninety-nine".