68643903 has 8 divisors (see below), whose sum is σ = 96342400. Its totient is φ = 43354008.

The previous prime is 68643877. The next prime is 68643931. The reversal of 68643903 is 30934686.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 68643903 - 2⁹ = 68643391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68643503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 602083 + ... + 602196.

It is an arithmetic number, because the mean of its divisors is an integer number (12042800).

Almost surely, 2^68643903 is an apocalyptic number.

68643903 is a deficient number, since it is larger than the sum of its proper divisors (27698497).

68643903 is a wasteful number, since it uses less digits than its factorization.

68643903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1204301.

The product of its (nonzero) digits is 93312, while the sum is 39.

The square root of 68643903 is about 8285.1616158045. The cubic root of 68643903 is about 409.4497934007.

The spelling of 68643903 in words is "sixty-eight million, six hundred forty-three thousand, nine hundred three".