516448909 has 2 divisors, whose sum is σ = 516448910. Its totient is φ = 516448908.

The previous prime is 516448903. The next prime is 516448943. The reversal of 516448909 is 909844615.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 317018025 + 199430884 = 17805^2 + 14122^2 .

It is a cyclic number.

It is not a de Polignac number, because 516448909 - 2⁹ = 516448397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (516448903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 258224454 + 258224455.

It is an arithmetic number, because the mean of its divisors is an integer number (258224455).

Almost surely, 2^516448909 is an apocalyptic number.

It is an amenable number.

516448909 is a deficient number, since it is larger than the sum of its proper divisors (1).

516448909 is an equidigital number, since it uses as much as digits as its factorization.

516448909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 311040, while the sum is 46.

The square root of 516448909 is about 22725.5122934556. The cubic root of 516448909 is about 802.3104608934.

The spelling of 516448909 in words is "five hundred sixteen million, four hundred forty-eight thousand, nine hundred nine".