68204591 has 16 divisors (see below), whose sum is σ = 87596544. Its totient is φ = 51616224.

The previous prime is 68204581. The next prime is 68204597. The reversal of 68204591 is 19540286.

It is a cyclic number.

It is not a de Polignac number, because 68204591 - 2²⁶ = 1095727 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68204597) 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 15 ways as a sum of consecutive naturals, for example, 14201 + ... + 18386.

It is an arithmetic number, because the mean of its divisors is an integer number (5474784).

Almost surely, 2^68204591 is an apocalyptic number.

68204591 is a deficient number, since it is larger than the sum of its proper divisors (19391953).

68204591 is a wasteful number, since it uses less digits than its factorization.

68204591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32630.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 68204591 is about 8258.6070859437. The cubic root of 68204591 is about 408.5744483324.

It can be divided in two parts, 6820 and 4591, that added together give a palindrome (11411).

The spelling of 68204591 in words is "sixty-eight million, two hundred four thousand, five hundred ninety-one".