68634687 has 8 divisors (see below), whose sum is σ = 99832320. Its totient is φ = 41596760.

The previous prime is 68634679. The next prime is 68634719. The reversal of 68634687 is 78643686.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 68634687 - 2³ = 68634679 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68634607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1039887 + ... + 1039952.

It is an arithmetic number, because the mean of its divisors is an integer number (12479040).

Almost surely, 2^68634687 is an apocalyptic number.

68634687 is a deficient number, since it is larger than the sum of its proper divisors (31197633).

68634687 is a wasteful number, since it uses less digits than its factorization.

68634687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2079853.

The product of its digits is 1161216, while the sum is 48.

The square root of 68634687 is about 8284.6054221067. The cubic root of 68634687 is about 409.4314685968.

The spelling of 68634687 in words is "sixty-eight million, six hundred thirty-four thousand, six hundred eighty-seven".