64239321 has 8 divisors (see below), whose sum is σ = 88606080. Its totient is φ = 41349392.

The previous prime is 64239319. The next prime is 64239337. The reversal of 64239321 is 12393246.

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 64239321 - 2¹ = 64239319 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64239121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 369105 + ... + 369278.

It is an arithmetic number, because the mean of its divisors is an integer number (11075760).

Almost surely, 2^64239321 is an apocalyptic number.

It is an amenable number.

64239321 is a deficient number, since it is larger than the sum of its proper divisors (24366759).

64239321 is a wasteful number, since it uses less digits than its factorization.

64239321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 738415.

The product of its digits is 7776, while the sum is 30.

The square root of 64239321 is about 8014.9436055408. The cubic root of 64239321 is about 400.4979652360.

The spelling of 64239321 in words is "sixty-four million, two hundred thirty-nine thousand, three hundred twenty-one".