85719000779 has 2 divisors, whose sum is σ = 85719000780. Its totient is φ = 85719000778.

The previous prime is 85719000739. The next prime is 85719000793. The reversal of 85719000779 is 97700091758.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85719000779 - 2¹² = 85718996683 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85719000779.

It is not a weakly prime, because it can be changed into another prime (85719000709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42859500389 + 42859500390.

It is an arithmetic number, because the mean of its divisors is an integer number (42859500390).

Almost surely, 2^85719000779 is an apocalyptic number.

85719000779 is a deficient number, since it is larger than the sum of its proper divisors (1).

85719000779 is an equidigital number, since it uses as much as digits as its factorization.

85719000779 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1111320, while the sum is 53.

The spelling of 85719000779 in words is "eighty-five billion, seven hundred nineteen million, seven hundred seventy-nine", and thus it is an aban number.