520729949 has 2 divisors, whose sum is σ = 520729950. Its totient is φ = 520729948.

The previous prime is 520729921. The next prime is 520729961. The reversal of 520729949 is 949927025.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 500416900 + 20313049 = 22370^2 + 4507^2 .

It is a cyclic number.

It is not a de Polignac number, because 520729949 - 2¹⁶ = 520664413 is a prime.

It is equal to p_27388964 and since 520729949 and 27388964 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (520729919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260364974 + 260364975.

It is an arithmetic number, because the mean of its divisors is an integer number (260364975).

Almost surely, 2^520729949 is an apocalyptic number.

It is an amenable number.

520729949 is a deficient number, since it is larger than the sum of its proper divisors (1).

520729949 is an equidigital number, since it uses as much as digits as its factorization.

520729949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 408240, while the sum is 47.

The square root of 520729949 is about 22819.5080797111. The cubic root of 520729949 is about 804.5212481945.

The spelling of 520729949 in words is "five hundred twenty million, seven hundred twenty-nine thousand, nine hundred forty-nine".