789194490779 has 2 divisors, whose sum is σ = 789194490780. Its totient is φ = 789194490778.

The previous prime is 789194490767. The next prime is 789194490787. The reversal of 789194490779 is 977094491987.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-789194490779 is a prime.

It is not a weakly prime, because it can be changed into another prime (789194490719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 394597245389 + 394597245390.

It is an arithmetic number, because the mean of its divisors is an integer number (394597245390).

Almost surely, 2^789194490779 is an apocalyptic number.

789194490779 is a deficient number, since it is larger than the sum of its proper divisors (1).

789194490779 is an equidigital number, since it uses as much as digits as its factorization.

789194490779 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288054144, while the sum is 74.

The spelling of 789194490779 in words is "seven hundred eighty-nine billion, one hundred ninety-four million, four hundred ninety thousand, seven hundred seventy-nine".