509950501 has 2 divisors, whose sum is σ = 509950502. Its totient is φ = 509950500.

The previous prime is 509950499. The next prime is 509950531. The reversal of 509950501 is 105059905.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 339517476 + 170433025 = 18426^2 + 13055^2 .

It is a cyclic number.

It is not a de Polignac number, because 509950501 - 2¹ = 509950499 is a prime.

Together with 509950499, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (509950531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 254975250 + 254975251.

It is an arithmetic number, because the mean of its divisors is an integer number (254975251).

Almost surely, 2^509950501 is an apocalyptic number.

It is an amenable number.

509950501 is a deficient number, since it is larger than the sum of its proper divisors (1).

509950501 is an equidigital number, since it uses as much as digits as its factorization.

509950501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10125, while the sum is 34.

The square root of 509950501 is about 22582.0836283989. The cubic root of 509950501 is about 798.9311251233.

The spelling of 509950501 in words is "five hundred nine million, nine hundred fifty thousand, five hundred one".