68784591 has 8 divisors (see below), whose sum is σ = 94191664. Its totient is φ = 44616960.

The previous prime is 68784581. The next prime is 68784623. The reversal of 68784591 is 19548786.

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

It is not a de Polignac number, because 68784591 - 2¹³ = 68776399 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 68784591.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68784571) 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 7 ways as a sum of consecutive naturals, for example, 309730 + ... + 309951.

It is an arithmetic number, because the mean of its divisors is an integer number (11773958).

Almost surely, 2^68784591 is an apocalyptic number.

68784591 is a deficient number, since it is larger than the sum of its proper divisors (25407073).

68784591 is a wasteful number, since it uses less digits than its factorization.

68784591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 619721.

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

The square root of 68784591 is about 8293.6476293607. The cubic root of 68784591 is about 409.7293295796.

The spelling of 68784591 in words is "sixty-eight million, seven hundred eighty-four thousand, five hundred ninety-one".