521929 has 2 divisors, whose sum is σ = 521930. Its totient is φ = 521928.

The previous prime is 521923. The next prime is 521981. The reversal of 521929 is 929125.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 328329 + 193600 = 573^2 + 440^2 .

It is a cyclic number.

It is not a de Polignac number, because 521929 - 2⁵ = 521897 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 521897 and 521906.

It is not a weakly prime, because it can be changed into another prime (521923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260964 + 260965.

It is an arithmetic number, because the mean of its divisors is an integer number (260965).

2⁵²¹⁹²⁹ is an apocalyptic number.

It is an amenable number.

521929 is a deficient number, since it is larger than the sum of its proper divisors (1).

521929 is an equidigital number, since it uses as much as digits as its factorization.

521929 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1620, while the sum is 28.

The square root of 521929 is about 722.4465378144. The cubic root of 521929 is about 80.5138281094.

The spelling of 521929 in words is "five hundred twenty-one thousand, nine hundred twenty-nine".