509265893 has 2 divisors, whose sum is σ = 509265894. Its totient is φ = 509265892.

The previous prime is 509265863. The next prime is 509265907. The reversal of 509265893 is 398562905.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 461476324 + 47789569 = 21482^2 + 6913^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-509265893 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (509265863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 254632946 + 254632947.

It is an arithmetic number, because the mean of its divisors is an integer number (254632947).

Almost surely, 2^509265893 is an apocalyptic number.

It is an amenable number.

509265893 is a deficient number, since it is larger than the sum of its proper divisors (1).

509265893 is an equidigital number, since it uses as much as digits as its factorization.

509265893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 583200, while the sum is 47.

The square root of 509265893 is about 22566.9203259993. The cubic root of 509265893 is about 798.5734436207.

The spelling of 509265893 in words is "five hundred nine million, two hundred sixty-five thousand, eight hundred ninety-three".