68993717 has 4 divisors (see below), whose sum is σ = 74300940. Its totient is φ = 63686496.

The previous prime is 68993689. The next prime is 68993741. The reversal of 68993717 is 71739986.

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

It can be written as a sum of positive squares in 2 ways, for example, as 22221796 + 46771921 = 4714^2 + 6839^2 .

It is a cyclic number.

It is not a de Polignac number, because 68993717 - 2⁶ = 68993653 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 (68993017) 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, 2653592 + ... + 2653617.

It is an arithmetic number, because the mean of its divisors is an integer number (18575235).

Almost surely, 2^68993717 is an apocalyptic number.

It is an amenable number.

68993717 is a deficient number, since it is larger than the sum of its proper divisors (5307223).

68993717 is a wasteful number, since it uses less digits than its factorization.

68993717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5307222.

The product of its digits is 571536, while the sum is 50.

The square root of 68993717 is about 8306.2456621509. The cubic root of 68993717 is about 410.1441432500.

The spelling of 68993717 in words is "sixty-eight million, nine hundred ninety-three thousand, seven hundred seventeen".