6899889 has 4 divisors (see below), whose sum is σ = 9199856. Its totient is φ = 4599924.

The previous prime is 6899863. The next prime is 6899891. The reversal of 6899889 is 9889986.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 6899889 - 2¹⁵ = 6867121 is a prime.

It is a D-number.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a nialpdrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (6899819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1149979 + ... + 1149984.

It is an arithmetic number, because the mean of its divisors is an integer number (2299964).

Almost surely, 2^6899889 is an apocalyptic number.

It is an amenable number.

6899889 is a deficient number, since it is larger than the sum of its proper divisors (2299967).

6899889 is a wasteful number, since it uses less digits than its factorization.

6899889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2299966.

The product of its digits is 2239488, while the sum is 57.

The square root of 6899889 is about 2626.7639787389. The cubic root of 6899889 is about 190.3768053243.

The spelling of 6899889 in words is "six million, eight hundred ninety-nine thousand, eight hundred eighty-nine".