68748591 has 4 divisors (see below), whose sum is σ = 91664792. Its totient is φ = 45832392.

The previous prime is 68748583. The next prime is 68748611. The reversal of 68748591 is 19584786.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 68748591 - 2³ = 68748583 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68748591.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68748521) 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, 11458096 + ... + 11458101.

It is an arithmetic number, because the mean of its divisors is an integer number (22916198).

Almost surely, 2^68748591 is an apocalyptic number.

68748591 is a deficient number, since it is larger than the sum of its proper divisors (22916201).

68748591 is a wasteful number, since it uses less digits than its factorization.

68748591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22916200.

The product of its digits is 483840, while the sum is 48.

The square root of 68748591 is about 8291.4770095563. The cubic root of 68748591 is about 409.6578366784.

The spelling of 68748591 in words is "sixty-eight million, seven hundred forty-eight thousand, five hundred ninety-one".