68780659 has 4 divisors (see below), whose sum is σ = 69807304. Its totient is φ = 67754016.

The previous prime is 68780609. The next prime is 68780671. The reversal of 68780659 is 95608786.

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

It is a cyclic number.

It is not a de Polignac number, because 68780659 - 2¹³ = 68772467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68780609) 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, 513222 + ... + 513355.

It is an arithmetic number, because the mean of its divisors is an integer number (17451826).

Almost surely, 2^68780659 is an apocalyptic number.

68780659 is a deficient number, since it is larger than the sum of its proper divisors (1026645).

68780659 is a wasteful number, since it uses less digits than its factorization.

68780659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1026644.

The product of its (nonzero) digits is 725760, while the sum is 49.

The square root of 68780659 is about 8293.4105770786. The cubic root of 68780659 is about 409.7215221797.

The spelling of 68780659 in words is "sixty-eight million, seven hundred eighty thousand, six hundred fifty-nine".