520940923 has 2 divisors, whose sum is σ = 520940924. Its totient is φ = 520940922.

The previous prime is 520940899. The next prime is 520940929. The reversal of 520940923 is 329049025.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-520940923 is a prime.

It is not a weakly prime, because it can be changed into another prime (520940929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260470461 + 260470462.

It is an arithmetic number, because the mean of its divisors is an integer number (260470462).

Almost surely, 2^520940923 is an apocalyptic number.

520940923 is a deficient number, since it is larger than the sum of its proper divisors (1).

520940923 is an equidigital number, since it uses as much as digits as its factorization.

520940923 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 520940923 is about 22824.1302791585. The cubic root of 520940923 is about 804.6298842536.

Adding to 520940923 its reverse (329049025), we get a palindrome (849989948).

The spelling of 520940923 in words is "five hundred twenty million, nine hundred forty thousand, nine hundred twenty-three".