520071641 has 2 divisors, whose sum is σ = 520071642. Its totient is φ = 520071640.

The previous prime is 520071631. The next prime is 520071661. The reversal of 520071641 is 146170025.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 311875600 + 208196041 = 17660^2 + 14429^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-520071641 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 520071641.

It is not a weakly prime, because it can be changed into another prime (520071631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260035820 + 260035821.

It is an arithmetic number, because the mean of its divisors is an integer number (260035821).

Almost surely, 2^520071641 is an apocalyptic number.

It is an amenable number.

520071641 is a deficient number, since it is larger than the sum of its proper divisors (1).

520071641 is an equidigital number, since it uses as much as digits as its factorization.

520071641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 520071641 is about 22805.0792807217. The cubic root of 520071641 is about 804.1820793571.

The spelling of 520071641 in words is "five hundred twenty million, seventy-one thousand, six hundred forty-one".