494669789 has 2 divisors, whose sum is σ = 494669790. Its totient is φ = 494669788.

The previous prime is 494669779. The next prime is 494669837. The reversal of 494669789 is 987966494.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 260273689 + 234396100 = 16133^2 + 15310^2 .

It is a cyclic number.

It is not a de Polignac number, because 494669789 - 2¹² = 494665693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (494669729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 247334894 + 247334895.

It is an arithmetic number, because the mean of its divisors is an integer number (247334895).

Almost surely, 2^494669789 is an apocalyptic number.

It is an amenable number.

494669789 is a deficient number, since it is larger than the sum of its proper divisors (1).

494669789 is an equidigital number, since it uses as much as digits as its factorization.

494669789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23514624, while the sum is 62.

The square root of 494669789 is about 22241.1732829003. The cubic root of 494669789 is about 790.8700498226.

The spelling of 494669789 in words is "four hundred ninety-four million, six hundred sixty-nine thousand, seven hundred eighty-nine".