64321439 has 8 divisors (see below), whose sum is σ = 79164960. Its totient is φ = 50891616.

The previous prime is 64321423. The next prime is 64321459. The reversal of 64321439 is 93412346.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64321439 - 2⁴ = 64321423 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64321459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 353324 + ... + 353505.

It is an arithmetic number, because the mean of its divisors is an integer number (9895620).

Almost surely, 2^64321439 is an apocalyptic number.

64321439 is a deficient number, since it is larger than the sum of its proper divisors (14843521).

64321439 is a wasteful number, since it uses less digits than its factorization.

64321439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 706849.

The product of its digits is 15552, while the sum is 32.

The square root of 64321439 is about 8020.0647752995. The cubic root of 64321439 is about 400.6685465745.

The spelling of 64321439 in words is "sixty-four million, three hundred twenty-one thousand, four hundred thirty-nine".