68688471 has 8 divisors (see below), whose sum is σ = 91786864. Its totient is φ = 45691200.

The previous prime is 68688463. The next prime is 68688497. The reversal of 68688471 is 17488686.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 68688471 - 2³ = 68688463 is a prime.

It is a super-3 number, since 3×68688471³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68688471.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68688271) 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 7 ways as a sum of consecutive naturals, for example, 23680 + ... + 26421.

It is an arithmetic number, because the mean of its divisors is an integer number (11473358).

Almost surely, 2^68688471 is an apocalyptic number.

68688471 is a deficient number, since it is larger than the sum of its proper divisors (23098393).

68688471 is a wasteful number, since it uses less digits than its factorization.

68688471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50561.

The product of its digits is 516096, while the sum is 48.

The square root of 68688471 is about 8287.8508070549. The cubic root of 68688471 is about 409.5383878701.

The spelling of 68688471 in words is "sixty-eight million, six hundred eighty-eight thousand, four hundred seventy-one".