68642003 has 4 divisors (see below), whose sum is σ = 72254760. Its totient is φ = 65029248.

The previous prime is 68641999. The next prime is 68642009. The reversal of 68642003 is 30024686.

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

It is not a de Polignac number, because 68642003 - 2² = 68641999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68642009) 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, 1806350 + ... + 1806387.

It is an arithmetic number, because the mean of its divisors is an integer number (18063690).

Almost surely, 2^68642003 is an apocalyptic number.

68642003 is a deficient number, since it is larger than the sum of its proper divisors (3612757).

68642003 is a wasteful number, since it uses less digits than its factorization.

68642003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3612756.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 68642003 is about 8285.0469521904. The cubic root of 68642003 is about 409.4460156348.

Adding to 68642003 its reverse (30024686), we get a palindrome (98666689).

The spelling of 68642003 in words is "sixty-eight million, six hundred forty-two thousand, three".