68713663 has 4 divisors (see below), whose sum is σ = 70389648. Its totient is φ = 67037680.

The previous prime is 68713657. The next prime is 68713681. The reversal of 68713663 is 36631786.

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 68713663 - 2²⁵ = 35159231 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68713693) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 837931 + ... + 838012.

It is an arithmetic number, because the mean of its divisors is an integer number (17597412).

Almost surely, 2^68713663 is an apocalyptic number.

68713663 is a deficient number, since it is larger than the sum of its proper divisors (1675985).

68713663 is a wasteful number, since it uses less digits than its factorization.

68713663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1675984.

The product of its digits is 108864, while the sum is 40.

The square root of 68713663 is about 8289.3704827327. The cubic root of 68713663 is about 409.5884488186.

The spelling of 68713663 in words is "sixty-eight million, seven hundred thirteen thousand, six hundred sixty-three".