64068439 has 4 divisors (see below), whose sum is σ = 64149624. Its totient is φ = 63987256.

The previous prime is 64068419. The next prime is 64068443. The reversal of 64068439 is 93486046.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93486046 = 2 ⋅46743023.

It is a cyclic number.

It is not a de Polignac number, because 64068439 - 2⁷ = 64068311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64068419) 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, 39397 + ... + 40990.

It is an arithmetic number, because the mean of its divisors is an integer number (16037406).

Almost surely, 2^64068439 is an apocalyptic number.

64068439 is a deficient number, since it is larger than the sum of its proper divisors (81185).

64068439 is an equidigital number, since it uses as much as digits as its factorization.

64068439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81184.

The product of its (nonzero) digits is 124416, while the sum is 40.

The square root of 64068439 is about 8004.2762945815. The cubic root of 64068439 is about 400.1425304566.

The spelling of 64068439 in words is "sixty-four million, sixty-eight thousand, four hundred thirty-nine".