868458779 has 2 divisors, whose sum is σ = 868458780. Its totient is φ = 868458778.

The previous prime is 868458763. The next prime is 868458791. The reversal of 868458779 is 977854868.

868458779 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 868458779 - 2⁴ = 868458763 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (868458749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434229389 + 434229390.

It is an arithmetic number, because the mean of its divisors is an integer number (434229390).

Almost surely, 2^868458779 is an apocalyptic number.

868458779 is a deficient number, since it is larger than the sum of its proper divisors (1).

868458779 is an equidigital number, since it uses as much as digits as its factorization.

868458779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27095040, while the sum is 62.

The square root of 868458779 is about 29469.6246837316. The cubic root of 868458779 is about 954.0762167951.

The spelling of 868458779 in words is "eight hundred sixty-eight million, four hundred fifty-eight thousand, seven hundred seventy-nine".