6456889 has 4 divisors (see below), whose sum is σ = 6836724. Its totient is φ = 6077056.

The previous prime is 6456887. The next prime is 6456893. The reversal of 6456889 is 9886546.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9886546 = 2 ⋅4943273.

It can be written as a sum of positive squares in 2 ways, for example, as 5978025 + 478864 = 2445^2 + 692^2 .

It is a cyclic number.

It is not a de Polignac number, because 6456889 - 2¹ = 6456887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6456881) 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, 189892 + ... + 189925.

It is an arithmetic number, because the mean of its divisors is an integer number (1709181).

Almost surely, 2^6456889 is an apocalyptic number.

It is an amenable number.

6456889 is a deficient number, since it is larger than the sum of its proper divisors (379835).

6456889 is a wasteful number, since it uses less digits than its factorization.

6456889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379834.

The product of its digits is 414720, while the sum is 46.

The square root of 6456889 is about 2541.0409284386. The cubic root of 6456889 is about 186.2120466785.

It can be divided in two parts, 64 and 56889, that added together give a triangular number (56953 = T₃₃₇).

The spelling of 6456889 in words is "six million, four hundred fifty-six thousand, eight hundred eighty-nine".