68531603 has 4 divisors (see below), whose sum is σ = 78321840. Its totient is φ = 58741368.

The previous prime is 68531581. The next prime is 68531633. The reversal of 68531603 is 30613586.

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

It is not a de Polignac number, because 68531603 - 2¹² = 68527507 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68531603.

It is not an unprimeable number, because it can be changed into a prime (68531633) 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, 4895108 + ... + 4895121.

It is an arithmetic number, because the mean of its divisors is an integer number (19580460).

Almost surely, 2^68531603 is an apocalyptic number.

68531603 is a deficient number, since it is larger than the sum of its proper divisors (9790237).

68531603 is an equidigital number, since it uses as much as digits as its factorization.

68531603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9790236.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 68531603 is about 8278.3816655189. The cubic root of 68531603 is about 409.2263877406.

The spelling of 68531603 in words is "sixty-eight million, five hundred thirty-one thousand, six hundred three".