509581223699 has 2 divisors, whose sum is σ = 509581223700. Its totient is φ = 509581223698.

The previous prime is 509581223651. The next prime is 509581223707. The reversal of 509581223699 is 996322185905.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-509581223699 is a prime.

It is not a weakly prime, because it can be changed into another prime (509581223639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 254790611849 + 254790611850.

It is an arithmetic number, because the mean of its divisors is an integer number (254790611850).

Almost surely, 2^509581223699 is an apocalyptic number.

509581223699 is a deficient number, since it is larger than the sum of its proper divisors (1).

509581223699 is an equidigital number, since it uses as much as digits as its factorization.

509581223699 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10497600, while the sum is 59.

The spelling of 509581223699 in words is "five hundred nine billion, five hundred eighty-one million, two hundred twenty-three thousand, six hundred ninety-nine".