68451717 has 4 divisors (see below), whose sum is σ = 91268960. Its totient is φ = 45634476.

The previous prime is 68451709. The next prime is 68451727. The reversal of 68451717 is 71715486.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 68451717 - 2³ = 68451709 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 (68451727) 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, 11408617 + ... + 11408622.

It is an arithmetic number, because the mean of its divisors is an integer number (22817240).

Almost surely, 2^68451717 is an apocalyptic number.

It is an amenable number.

68451717 is a deficient number, since it is larger than the sum of its proper divisors (22817243).

68451717 is a wasteful number, since it uses less digits than its factorization.

68451717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22817242.

The product of its digits is 47040, while the sum is 39.

The square root of 68451717 is about 8273.5552817395. Note that the first 3 decimals coincide. The cubic root of 68451717 is about 409.0673167494.

The spelling of 68451717 in words is "sixty-eight million, four hundred fifty-one thousand, seven hundred seventeen".