6406889 has 4 divisors (see below), whose sum is σ = 6416256. Its totient is φ = 6397524.

The previous prime is 6406879. The next prime is 6406913. The reversal of 6406889 is 9886046.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6406889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6406849) 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, 3569 + ... + 5054.

It is an arithmetic number, because the mean of its divisors is an integer number (1604064).

Almost surely, 2^6406889 is an apocalyptic number.

It is an amenable number.

6406889 is a deficient number, since it is larger than the sum of its proper divisors (9367).

6406889 is an equidigital number, since it uses as much as digits as its factorization.

6406889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9366.

The product of its (nonzero) digits is 82944, while the sum is 41.

The square root of 6406889 is about 2531.1833201094. The cubic root of 6406889 is about 185.7301459264.

The spelling of 6406889 in words is "six million, four hundred six thousand, eight hundred eighty-nine".