499419989 has 2 divisors, whose sum is σ = 499419990. Its totient is φ = 499419988.

The previous prime is 499419941. The next prime is 499420001. The reversal of 499419989 is 989914994.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 499164964 + 255025 = 22342^2 + 505^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-499419989 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (499419919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249709994 + 249709995.

It is an arithmetic number, because the mean of its divisors is an integer number (249709995).

Almost surely, 2^499419989 is an apocalyptic number.

It is an amenable number.

499419989 is a deficient number, since it is larger than the sum of its proper divisors (1).

499419989 is an equidigital number, since it uses as much as digits as its factorization.

499419989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7558272, while the sum is 62.

The square root of 499419989 is about 22347.7065713688. The cubic root of 499419989 is about 793.3935038788.

The spelling of 499419989 in words is "four hundred ninety-nine million, four hundred nineteen thousand, nine hundred eighty-nine".