68015903 has 2 divisors, whose sum is σ = 68015904. Its totient is φ = 68015902.

The previous prime is 68015887. The next prime is 68015911. The reversal of 68015903 is 30951086.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68015903 - 2⁴ = 68015887 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68015903.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68015503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34007951 + 34007952.

It is an arithmetic number, because the mean of its divisors is an integer number (34007952).

Almost surely, 2^68015903 is an apocalyptic number.

68015903 is a deficient number, since it is larger than the sum of its proper divisors (1).

68015903 is an equidigital number, since it uses as much as digits as its factorization.

68015903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 68015903 is about 8247.1754558758. The cubic root of 68015903 is about 408.1973266141.

Adding to 68015903 its reverse (30951086), we get a palindrome (98966989).

The spelling of 68015903 in words is "sixty-eight million, fifteen thousand, nine hundred three".