68785579 has 2 divisors, whose sum is σ = 68785580. Its totient is φ = 68785578.

The previous prime is 68785547. The next prime is 68785609. The reversal of 68785579 is 97558786.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68785579 - 2⁵ = 68785547 is a prime.

It is not a weakly prime, because it can be changed into another prime (62785579) 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 as a sum of consecutive naturals, namely, 34392789 + 34392790.

It is an arithmetic number, because the mean of its divisors is an integer number (34392790).

Almost surely, 2^68785579 is an apocalyptic number.

68785579 is a deficient number, since it is larger than the sum of its proper divisors (1).

68785579 is an equidigital number, since it uses as much as digits as its factorization.

68785579 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4233600, while the sum is 55.

The square root of 68785579 is about 8293.7071928059. The cubic root of 68785579 is about 409.7312913108.

The spelling of 68785579 in words is "sixty-eight million, seven hundred eighty-five thousand, five hundred seventy-nine".