521198039 has 2 divisors, whose sum is σ = 521198040. Its totient is φ = 521198038.

The previous prime is 521198033. The next prime is 521198047. The reversal of 521198039 is 930891125.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 521198039 - 2⁴ = 521198023 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 521197993 and 521198011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (521198033) 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, 260599019 + 260599020.

It is an arithmetic number, because the mean of its divisors is an integer number (260599020).

Almost surely, 2^521198039 is an apocalyptic number.

521198039 is a deficient number, since it is larger than the sum of its proper divisors (1).

521198039 is an equidigital number, since it uses as much as digits as its factorization.

521198039 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 38.

The square root of 521198039 is about 22829.7621319189. The cubic root of 521198039 is about 804.7622403942.

The spelling of 521198039 in words is "five hundred twenty-one million, one hundred ninety-eight thousand, thirty-nine".