509145361 has 2 divisors, whose sum is σ = 509145362. Its totient is φ = 509145360.

The previous prime is 509145353. The next prime is 509145383. The reversal of 509145361 is 163541905.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 499254336 + 9891025 = 22344^2 + 3145^2 .

It is a cyclic number.

It is not a de Polignac number, because 509145361 - 2³ = 509145353 is a prime.

It is not a weakly prime, because it can be changed into another prime (509145391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 254572680 + 254572681.

It is an arithmetic number, because the mean of its divisors is an integer number (254572681).

Almost surely, 2^509145361 is an apocalyptic number.

It is an amenable number.

509145361 is a deficient number, since it is larger than the sum of its proper divisors (1).

509145361 is an equidigital number, since it uses as much as digits as its factorization.

509145361 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16200, while the sum is 34.

The square root of 509145361 is about 22564.2496219130. The cubic root of 509145361 is about 798.5104370784.

The spelling of 509145361 in words is "five hundred nine million, one hundred forty-five thousand, three hundred sixty-one".