68644479 has 8 divisors (see below), whose sum is σ = 94682160. Its totient is φ = 44184896.

The previous prime is 68644427. The next prime is 68644507. The reversal of 68644479 is 97444686.

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 68644479 - 2¹⁹ = 68120191 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68644409) 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 7 ways as a sum of consecutive naturals, for example, 394422 + ... + 394595.

It is an arithmetic number, because the mean of its divisors is an integer number (11835270).

Almost surely, 2^68644479 is an apocalyptic number.

68644479 is a deficient number, since it is larger than the sum of its proper divisors (26037681).

68644479 is a wasteful number, since it uses less digits than its factorization.

68644479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 789049.

The product of its digits is 1161216, while the sum is 48.

The square root of 68644479 is about 8285.1963766709. The cubic root of 68644479 is about 409.4509386465.

The spelling of 68644479 in words is "sixty-eight million, six hundred forty-four thousand, four hundred seventy-nine".