68688771 has 4 divisors (see below), whose sum is σ = 91585032. Its totient is φ = 45792512.

The previous prime is 68688769. The next prime is 68688799. The reversal of 68688771 is 17788686.

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 68688771 - 2¹ = 68688769 is a prime.

It is a super-2 number, since 2×68688771² = 9436294522980882, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (68688271) 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, 11448126 + ... + 11448131.

It is an arithmetic number, because the mean of its divisors is an integer number (22896258).

Almost surely, 2^68688771 is an apocalyptic number.

68688771 is a deficient number, since it is larger than the sum of its proper divisors (22896261).

68688771 is a wasteful number, since it uses less digits than its factorization.

68688771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22896260.

The product of its digits is 903168, while the sum is 51.

The square root of 68688771 is about 8287.8689058165. The cubic root of 68688771 is about 409.5389840950.

The spelling of 68688771 in words is "sixty-eight million, six hundred eighty-eight thousand, seven hundred seventy-one".