516409249 has 2 divisors, whose sum is σ = 516409250. Its totient is φ = 516409248.

The previous prime is 516409247. The next prime is 516409297. The reversal of 516409249 is 942904615.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 373726224 + 142683025 = 19332^2 + 11945^2 .

It is a cyclic number.

It is not a de Polignac number, because 516409249 - 2¹ = 516409247 is a prime.

Together with 516409247, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (516409247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 258204624 + 258204625.

It is an arithmetic number, because the mean of its divisors is an integer number (258204625).

Almost surely, 2^516409249 is an apocalyptic number.

It is an amenable number.

516409249 is a deficient number, since it is larger than the sum of its proper divisors (1).

516409249 is an equidigital number, since it uses as much as digits as its factorization.

516409249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 516409249 is about 22724.6396891128. The cubic root of 516409249 is about 802.2899229164.

The spelling of 516409249 in words is "five hundred sixteen million, four hundred nine thousand, two hundred forty-nine".