68931686 has 8 divisors (see below), whose sum is σ = 103632264. Its totient is φ = 34387600.

The previous prime is 68931683. The next prime is 68931689. The reversal of 68931686 is 68613986.

It is an interprime number because it is at equal distance from previous prime (68931683) and next prime (68931689).

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

It is a self number, because there is not a number n which added to its sum of digits gives 68931686.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68931683) 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, 38015 + ... + 39786.

It is an arithmetic number, because the mean of its divisors is an integer number (12954033).

Almost surely, 2^68931686 is an apocalyptic number.

68931686 is a deficient number, since it is larger than the sum of its proper divisors (34700578).

68931686 is a wasteful number, since it uses less digits than its factorization.

68931686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78246.

The product of its digits is 373248, while the sum is 47.

The square root of 68931686 is about 8302.5108250456. The cubic root of 68931686 is about 410.0211886730.

The spelling of 68931686 in words is "sixty-eight million, nine hundred thirty-one thousand, six hundred eighty-six".