521362829 has 4 divisors (see below), whose sum is σ = 561467676. Its totient is φ = 481257984.

The previous prime is 521362823. The next prime is 521362837. The reversal of 521362829 is 928263125.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 353064100 + 168298729 = 18790^2 + 12973^2 .

It is a cyclic number.

It is not a de Polignac number, because 521362829 - 2²⁰ = 520314253 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 521362792 and 521362801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521362823) 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 in 3 ways as a sum of consecutive naturals, for example, 20052404 + ... + 20052429.

It is an arithmetic number, because the mean of its divisors is an integer number (140366919).

Almost surely, 2^521362829 is an apocalyptic number.

It is an amenable number.

521362829 is a deficient number, since it is larger than the sum of its proper divisors (40104847).

521362829 is a wasteful number, since it uses less digits than its factorization.

521362829 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40104846.

The product of its digits is 51840, while the sum is 38.

The square root of 521362829 is about 22833.3709513072. The cubic root of 521362829 is about 804.8470467988.

The spelling of 521362829 in words is "five hundred twenty-one million, three hundred sixty-two thousand, eight hundred twenty-nine".