6464889 has 6 divisors (see below), whose sum is σ = 9338186. Its totient is φ = 4309920.

The previous prime is 6464881. The next prime is 6464891. The reversal of 6464889 is 9884646.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 6335289 + 129600 = 2517^2 + 360^2 .

It is not a de Polignac number, because 6464889 - 2³ = 6464881 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (6464881) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 359152 + ... + 359169.

Almost surely, 2^6464889 is an apocalyptic number.

It is an amenable number.

6464889 is a deficient number, since it is larger than the sum of its proper divisors (2873297).

6464889 is a wasteful number, since it uses less digits than its factorization.

6464889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 718327 (or 718324 counting only the distinct ones).

The product of its digits is 331776, while the sum is 45.

The square root of 6464889 is about 2542.6145991872. The cubic root of 6464889 is about 186.2889196927.

The spelling of 6464889 in words is "six million, four hundred sixty-four thousand, eight hundred eighty-nine".