64255439 has 4 divisors (see below), whose sum is σ = 65622624. Its totient is φ = 62888256.

The previous prime is 64255423. The next prime is 64255447. The reversal of 64255439 is 93455246.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93455246 = 2 ⋅46727623.

It is not a de Polignac number, because 64255439 - 2⁴ = 64255423 is a prime.

It is a super-2 number, since 2×64255439² = 8257522882165442, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64255469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 683522 + ... + 683615.

It is an arithmetic number, because the mean of its divisors is an integer number (16405656).

Almost surely, 2^64255439 is an apocalyptic number.

64255439 is a deficient number, since it is larger than the sum of its proper divisors (1367185).

64255439 is a wasteful number, since it uses less digits than its factorization.

64255439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1367184.

The product of its digits is 129600, while the sum is 38.

The square root of 64255439 is about 8015.9490392592. The cubic root of 64255439 is about 400.5314581512.

The spelling of 64255439 in words is "sixty-four million, two hundred fifty-five thousand, four hundred thirty-nine".