64239879 has 8 divisors (see below), whose sum is σ = 93439872. Its totient is φ = 38933240.

The previous prime is 64239839. The next prime is 64239883. The reversal of 64239879 is 97893246.

64239879 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 64239879 - 2⁷ = 64239751 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64239809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 973299 + ... + 973364.

It is an arithmetic number, because the mean of its divisors is an integer number (11679984).

Almost surely, 2^64239879 is an apocalyptic number.

64239879 is a deficient number, since it is larger than the sum of its proper divisors (29199993).

64239879 is a wasteful number, since it uses less digits than its factorization.

64239879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1946677.

The product of its digits is 653184, while the sum is 48.

The square root of 64239879 is about 8014.9784154419. The cubic root of 64239879 is about 400.4991248436.

The spelling of 64239879 in words is "sixty-four million, two hundred thirty-nine thousand, eight hundred seventy-nine".