509791027 has 2 divisors, whose sum is σ = 509791028. Its totient is φ = 509791026.

The previous prime is 509790997. The next prime is 509791031. The reversal of 509791027 is 720197905.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-509791027 is a prime.

It is not a weakly prime, because it can be changed into another prime (509791057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 254895513 + 254895514.

It is an arithmetic number, because the mean of its divisors is an integer number (254895514).

Almost surely, 2^509791027 is an apocalyptic number.

509791027 is a deficient number, since it is larger than the sum of its proper divisors (1).

509791027 is an equidigital number, since it uses as much as digits as its factorization.

509791027 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 39690, while the sum is 40.

The square root of 509791027 is about 22578.5523672356. The cubic root of 509791027 is about 798.8478346696.

The spelling of 509791027 in words is "five hundred nine million, seven hundred ninety-one thousand, twenty-seven".