509573081 has 2 divisors, whose sum is σ = 509573082. Its totient is φ = 509573080.

The previous prime is 509573059. The next prime is 509573093. The reversal of 509573081 is 180375905.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 291863056 + 217710025 = 17084^2 + 14755^2 .

It is a cyclic number.

It is not a de Polignac number, because 509573081 - 2⁶ = 509573017 is a prime.

It is a super-2 number, since 2×509573081² = 519329449759665122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (509563081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 254786540 + 254786541.

It is an arithmetic number, because the mean of its divisors is an integer number (254786541).

Almost surely, 2^509573081 is an apocalyptic number.

It is an amenable number.

509573081 is a deficient number, since it is larger than the sum of its proper divisors (1).

509573081 is an equidigital number, since it uses as much as digits as its factorization.

509573081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37800, while the sum is 38.

The square root of 509573081 is about 22573.7254568226. The cubic root of 509573081 is about 798.7339772273.

The spelling of 509573081 in words is "five hundred nine million, five hundred seventy-three thousand, eighty-one".