68193591 has 8 divisors (see below), whose sum is σ = 91095024. Its totient is φ = 45377280.

The previous prime is 68193589. The next prime is 68193637. The reversal of 68193591 is 19539186.

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

It is not a de Polignac number, because 68193591 - 2¹ = 68193589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68193581) 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 7 ways as a sum of consecutive naturals, for example, 19386 + ... + 22631.

It is an arithmetic number, because the mean of its divisors is an integer number (11386878).

Almost surely, 2^68193591 is an apocalyptic number.

68193591 is a deficient number, since it is larger than the sum of its proper divisors (22901433).

68193591 is a wasteful number, since it uses less digits than its factorization.

68193591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42561.

The product of its digits is 58320, while the sum is 42.

The square root of 68193591 is about 8257.9410872202. The cubic root of 68193591 is about 408.5524822618.

The spelling of 68193591 in words is "sixty-eight million, one hundred ninety-three thousand, five hundred ninety-one".