68816693 has 16 divisors (see below), whose sum is σ = 76420800. Its totient is φ = 61961680.

The previous prime is 68816687. The next prime is 68816701. The reversal of 68816693 is 39661886.

It is a de Polignac number, because none of the positive numbers 2^k-68816693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68816393) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 198146 + ... + 198492.

It is an arithmetic number, because the mean of its divisors is an integer number (4776300).

Almost surely, 2^68816693 is an apocalyptic number.

It is an amenable number.

68816693 is a deficient number, since it is larger than the sum of its proper divisors (7604107).

68816693 is a wasteful number, since it uses less digits than its factorization.

68816693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529 (or 507 counting only the distinct ones).

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

The square root of 68816693 is about 8295.5827402299. The cubic root of 68816693 is about 409.7930603516.

The spelling of 68816693 in words is "sixty-eight million, eight hundred sixteen thousand, six hundred ninety-three".