509674543321 has 2 divisors, whose sum is σ = 509674543322. Its totient is φ = 509674543320.

The previous prime is 509674543289. The next prime is 509674543333. The reversal of 509674543321 is 123345476905.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 305876469721 + 203798073600 = 553061^2 + 451440^2 .

It is a cyclic number.

It is not a de Polignac number, because 509674543321 - 2⁵ = 509674543289 is a prime.

It is not a weakly prime, because it can be changed into another prime (509674543361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 254837271660 + 254837271661.

It is an arithmetic number, because the mean of its divisors is an integer number (254837271661).

Almost surely, 2^509674543321 is an apocalyptic number.

It is an amenable number.

509674543321 is a deficient number, since it is larger than the sum of its proper divisors (1).

509674543321 is an equidigital number, since it uses as much as digits as its factorization.

509674543321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2721600, while the sum is 49.

The spelling of 509674543321 in words is "five hundred nine billion, six hundred seventy-four million, five hundred forty-three thousand, three hundred twenty-one".