520673969 has 2 divisors, whose sum is σ = 520673970. Its totient is φ = 520673968.

The previous prime is 520673963. The next prime is 520673983. The reversal of 520673969 is 969376025.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 445210000 + 75463969 = 21100^2 + 8687^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-520673969 is a prime.

It is a super-2 number, since 2×520673969² = 542202763988425922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (520673963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260336984 + 260336985.

It is an arithmetic number, because the mean of its divisors is an integer number (260336985).

Almost surely, 2^520673969 is an apocalyptic number.

It is an amenable number.

520673969 is a deficient number, since it is larger than the sum of its proper divisors (1).

520673969 is an equidigital number, since it uses as much as digits as its factorization.

520673969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 612360, while the sum is 47.

The square root of 520673969 is about 22818.2814646502. The cubic root of 520673969 is about 804.4924176951.

The spelling of 520673969 in words is "five hundred twenty million, six hundred seventy-three thousand, nine hundred sixty-nine".