68772779 has 2 divisors, whose sum is σ = 68772780. Its totient is φ = 68772778.

The previous prime is 68772763. The next prime is 68772793. The reversal of 68772779 is 97727786.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68772779 - 2⁴ = 68772763 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68772779.

It is not a weakly prime, because it can be changed into another prime (68772719) 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, 34386389 + 34386390.

It is an arithmetic number, because the mean of its divisors is an integer number (34386390).

Almost surely, 2^68772779 is an apocalyptic number.

68772779 is a deficient number, since it is larger than the sum of its proper divisors (1).

68772779 is an equidigital number, since it uses as much as digits as its factorization.

68772779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2074464, while the sum is 53.

The square root of 68772779 is about 8292.9354875098. The cubic root of 68772779 is about 409.7058747145.

The spelling of 68772779 in words is "sixty-eight million, seven hundred seventy-two thousand, seven hundred seventy-nine".