6899421 has 8 divisors (see below), whose sum is σ = 9223360. Its totient is φ = 4587552.

The previous prime is 6899383. The next prime is 6899423. The reversal of 6899421 is 1249986.

6899421 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 6899421 - 2⁷ = 6899293 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 6899421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6899423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1585 + ... + 4038.

It is an arithmetic number, because the mean of its divisors is an integer number (1152920).

Almost surely, 2^6899421 is an apocalyptic number.

It is an amenable number.

6899421 is a deficient number, since it is larger than the sum of its proper divisors (2323939).

6899421 is a wasteful number, since it uses less digits than its factorization.

6899421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6035.

The product of its digits is 31104, while the sum is 39.

The square root of 6899421 is about 2626.6748942342. The cubic root of 6899421 is about 190.3725009864.

The spelling of 6899421 in words is "six million, eight hundred ninety-nine thousand, four hundred twenty-one".