68307503 has 4 divisors (see below), whose sum is σ = 74517288. Its totient is φ = 62097720.

The previous prime is 68307469. The next prime is 68307511. The reversal of 68307503 is 30570386.

It is a happy number.

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 68307503 - 2¹² = 68303407 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 68307503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68307563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3104876 + ... + 3104897.

It is an arithmetic number, because the mean of its divisors is an integer number (18629322).

Almost surely, 2^68307503 is an apocalyptic number.

68307503 is a deficient number, since it is larger than the sum of its proper divisors (6209785).

68307503 is a wasteful number, since it uses less digits than its factorization.

68307503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6209784.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 68307503 is about 8264.8353280631. The cubic root of 68307503 is about 408.7798405832.

Adding to 68307503 its reverse (30570386), we get a palindrome (98877889).

The spelling of 68307503 in words is "sixty-eight million, three hundred seven thousand, five hundred three".