494888689 has 2 divisors, whose sum is σ = 494888690. Its totient is φ = 494888688.

The previous prime is 494888663. The next prime is 494888707. The reversal of 494888689 is 986888494.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 457617664 + 37271025 = 21392^2 + 6105^2 .

It is a cyclic number.

It is not a de Polignac number, because 494888689 - 2⁵ = 494888657 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 494888689.

It is not a weakly prime, because it can be changed into another prime (494888629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 247444344 + 247444345.

It is an arithmetic number, because the mean of its divisors is an integer number (247444345).

Almost surely, 2^494888689 is an apocalyptic number.

It is an amenable number.

494888689 is a deficient number, since it is larger than the sum of its proper divisors (1).

494888689 is an equidigital number, since it uses as much as digits as its factorization.

494888689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31850496, while the sum is 64.

The square root of 494888689 is about 22246.0937919447. The cubic root of 494888689 is about 790.9866905445.

The spelling of 494888689 in words is "four hundred ninety-four million, eight hundred eighty-eight thousand, six hundred eighty-nine".