6464399 has 4 divisors (see below), whose sum is σ = 6672960. Its totient is φ = 6255840.

The previous prime is 6464387. The next prime is 6464401. The reversal of 6464399 is 9934646.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6464399 - 2¹⁶ = 6398863 is a prime.

It is a d-powerful number, because it can be written as 6² + 4² + 6⁸ + 4⁵ + 3¹⁴ + 9 + 9³ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6464329) 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, 104234 + ... + 104295.

It is an arithmetic number, because the mean of its divisors is an integer number (1668240).

Almost surely, 2^6464399 is an apocalyptic number.

6464399 is a deficient number, since it is larger than the sum of its proper divisors (208561).

6464399 is a wasteful number, since it uses less digits than its factorization.

6464399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208560.

The product of its digits is 139968, while the sum is 41.

The square root of 6464399 is about 2542.5182398559. The cubic root of 6464399 is about 186.2842130443.

The spelling of 6464399 in words is "six million, four hundred sixty-four thousand, three hundred ninety-nine".