68644603 has 4 divisors (see below), whose sum is σ = 69274480. Its totient is φ = 68014728.

The previous prime is 68644591. The next prime is 68644607. The reversal of 68644603 is 30644686.

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 68644603 - 2⁹ = 68644091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68644607) 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, 314775 + ... + 314992.

It is an arithmetic number, because the mean of its divisors is an integer number (17318620).

Almost surely, 2^68644603 is an apocalyptic number.

68644603 is a deficient number, since it is larger than the sum of its proper divisors (629877).

68644603 is a wasteful number, since it uses less digits than its factorization.

68644603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 629876.

The product of its (nonzero) digits is 82944, while the sum is 37.

The square root of 68644603 is about 8285.2038598939. The cubic root of 68644603 is about 409.4511851916.

The spelling of 68644603 in words is "sixty-eight million, six hundred forty-four thousand, six hundred three".