68239117 has 4 divisors (see below), whose sum is σ = 70592220. Its totient is φ = 65886016.

The previous prime is 68239111. The next prime is 68239121. The reversal of 68239117 is 71193286.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71193286 = 2 ⋅35596643.

It can be written as a sum of positive squares in 2 ways, for example, as 26842761 + 41396356 = 5181^2 + 6434^2 .

It is a cyclic number.

It is not a de Polignac number, because 68239117 - 2³ = 68239109 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 (68239111) 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, 1176508 + ... + 1176565.

It is an arithmetic number, because the mean of its divisors is an integer number (17648055).

Almost surely, 2^68239117 is an apocalyptic number.

It is an amenable number.

68239117 is a deficient number, since it is larger than the sum of its proper divisors (2353103).

68239117 is a wasteful number, since it uses less digits than its factorization.

68239117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2353102.

The product of its digits is 18144, while the sum is 37.

The square root of 68239117 is about 8260.6971255458. The cubic root of 68239117 is about 408.6433785006.

The spelling of 68239117 in words is "sixty-eight million, two hundred thirty-nine thousand, one hundred seventeen".