68375993 has 4 divisors (see below), whose sum is σ = 78144000. Its totient is φ = 58607988.

The previous prime is 68375969. The next prime is 68375999. The reversal of 68375993 is 39957386.

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-68375993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68375999) 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 3 ways as a sum of consecutive naturals, for example, 4883993 + ... + 4884006.

It is an arithmetic number, because the mean of its divisors is an integer number (19536000).

Almost surely, 2^68375993 is an apocalyptic number.

It is an amenable number.

68375993 is a deficient number, since it is larger than the sum of its proper divisors (9768007).

68375993 is an equidigital number, since it uses as much as digits as its factorization.

68375993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9768006.

The product of its digits is 1224720, while the sum is 50.

The square root of 68375993 is about 8268.9777481863. The cubic root of 68375993 is about 408.9164189378.

The spelling of 68375993 in words is "sixty-eight million, three hundred seventy-five thousand, nine hundred ninety-three".