68772917 has 4 divisors (see below), whose sum is σ = 68790240. Its totient is φ = 68755596.

The previous prime is 68772901. The next prime is 68772923. The reversal of 68772917 is 71927786.

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 a cyclic number.

It is not a de Polignac number, because 68772917 - 2⁴ = 68772901 is a prime.

It is a super-2 number, since 2×68772917² = 9459428225377778, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68772317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 584 + ... + 11742.

It is an arithmetic number, because the mean of its divisors is an integer number (17197560).

Almost surely, 2^68772917 is an apocalyptic number.

It is an amenable number.

68772917 is a deficient number, since it is larger than the sum of its proper divisors (17323).

68772917 is a wasteful number, since it uses less digits than its factorization.

68772917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17322.

The product of its digits is 296352, while the sum is 47.

The square root of 68772917 is about 8292.9438078405. The cubic root of 68772917 is about 409.7061487540.

The spelling of 68772917 in words is "sixty-eight million, seven hundred seventy-two thousand, nine hundred seventeen".