64068539 has 4 divisors (see below), whose sum is σ = 64106256. Its totient is φ = 64030824.

The previous prime is 64068533. The next prime is 64068541. The reversal of 64068539 is 93586046.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64068539 - 2¹² = 64064443 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64068496 and 64068505.

It is not an unprimeable number, because it can be changed into a prime (64068533) 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, 16184 + ... + 19749.

It is an arithmetic number, because the mean of its divisors is an integer number (16026564).

Almost surely, 2^64068539 is an apocalyptic number.

64068539 is a deficient number, since it is larger than the sum of its proper divisors (37717).

64068539 is a wasteful number, since it uses less digits than its factorization.

64068539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37716.

The product of its (nonzero) digits is 155520, while the sum is 41.

The square root of 64068539 is about 8004.2825412400. The cubic root of 64068539 is about 400.1427386415.

The spelling of 64068539 in words is "sixty-four million, sixty-eight thousand, five hundred thirty-nine".