509766091 has 2 divisors, whose sum is σ = 509766092. Its totient is φ = 509766090.

The previous prime is 509765987. The next prime is 509766113. The reversal of 509766091 is 190667905.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 509766091 - 2⁹ = 509765579 is a prime.

It is a super-2 number, since 2×509766091² = 519722935066840562, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (509736091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 254883045 + 254883046.

It is an arithmetic number, because the mean of its divisors is an integer number (254883046).

Almost surely, 2^509766091 is an apocalyptic number.

509766091 is a deficient number, since it is larger than the sum of its proper divisors (1).

509766091 is an equidigital number, since it uses as much as digits as its factorization.

509766091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 102060, while the sum is 43.

The square root of 509766091 is about 22578.0001550182. Note that the first 3 decimals coincide. The cubic root of 509766091 is about 798.8348094669.

The spelling of 509766091 in words is "five hundred nine million, seven hundred sixty-six thousand, ninety-one".