6722889 has 4 divisors (see below), whose sum is σ = 8963856. Its totient is φ = 4481924.

The previous prime is 6722879. The next prime is 6722899. The reversal of 6722889 is 9882276.

It is a happy number.

6722889 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 an interprime number because it is at equal distance from previous prime (6722879) and next prime (6722899).

It is a cyclic number.

It is not a de Polignac number, because 6722889 - 2⁵ = 6722857 is a prime.

It is a D-number.

6722889 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 6722889.

It is not an unprimeable number, because it can be changed into a prime (6722819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1120479 + ... + 1120484.

It is an arithmetic number, because the mean of its divisors is an integer number (2240964).

Almost surely, 2^6722889 is an apocalyptic number.

It is an amenable number.

6722889 is a deficient number, since it is larger than the sum of its proper divisors (2240967).

6722889 is a wasteful number, since it uses less digits than its factorization.

6722889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2240966.

The product of its digits is 96768, while the sum is 42.

The square root of 6722889 is about 2592.8534474590. The cubic root of 6722889 is about 188.7347978342.

It can be divided in two parts, 6 and 722889, that multiplied together give a palindrome (4337334).

The spelling of 6722889 in words is "six million, seven hundred twenty-two thousand, eight hundred eighty-nine".