68145603 has 4 divisors (see below), whose sum is σ = 90860808. Its totient is φ = 45430400.

The previous prime is 68145599. The next prime is 68145611. The reversal of 68145603 is 30654186.

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 68145603 - 2² = 68145599 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68145613) 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 3 ways as a sum of consecutive naturals, for example, 11357598 + ... + 11357603.

It is an arithmetic number, because the mean of its divisors is an integer number (22715202).

Almost surely, 2^68145603 is an apocalyptic number.

68145603 is a deficient number, since it is larger than the sum of its proper divisors (22715205).

68145603 is a wasteful number, since it uses less digits than its factorization.

68145603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22715204.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 68145603 is about 8255.0350090112. The cubic root of 68145603 is about 408.4566266403.

Adding to 68145603 its reverse (30654186), we get a palindrome (98799789).

The spelling of 68145603 in words is "sixty-eight million, one hundred forty-five thousand, six hundred three".