68117807 has 4 divisors (see below), whose sum is σ = 68134656. Its totient is φ = 68100960.

The previous prime is 68117779. The next prime is 68117813. The reversal of 68117807 is 70871186.

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 68117807 - 2⁸ = 68117551 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 (68117837) 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, 1682 + ... + 11792.

It is an arithmetic number, because the mean of its divisors is an integer number (17033664).

Almost surely, 2^68117807 is an apocalyptic number.

68117807 is a deficient number, since it is larger than the sum of its proper divisors (16849).

68117807 is a wasteful number, since it uses less digits than its factorization.

68117807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16848.

The product of its (nonzero) digits is 18816, while the sum is 38.

The square root of 68117807 is about 8253.3512587312. The cubic root of 68117807 is about 408.4010837835.

The spelling of 68117807 in words is "sixty-eight million, one hundred seventeen thousand, eight hundred seven".