68816593 has 4 divisors (see below), whose sum is σ = 68873728. Its totient is φ = 68759460.

The previous prime is 68816569. The next prime is 68816609. The reversal of 68816593 is 39561886.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68816593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68816513) 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 3 ways as a sum of consecutive naturals, for example, 26721 + ... + 29182.

It is an arithmetic number, because the mean of its divisors is an integer number (17218432).

Almost surely, 2^68816593 is an apocalyptic number.

It is an amenable number.

68816593 is a deficient number, since it is larger than the sum of its proper divisors (57135).

68816593 is a wasteful number, since it uses less digits than its factorization.

68816593 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57134.

The product of its digits is 311040, while the sum is 46.

The square root of 68816593 is about 8295.5767129236. The cubic root of 68816593 is about 409.7928618565.

The spelling of 68816593 in words is "sixty-eight million, eight hundred sixteen thousand, five hundred ninety-three".