870539521 has 2 divisors, whose sum is σ = 870539522. Its totient is φ = 870539520.

The previous prime is 870539497. The next prime is 870539531. The reversal of 870539521 is 125935078.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 730945296 + 139594225 = 27036^2 + 11815^2 .

It is a cyclic number.

It is not a de Polignac number, because 870539521 - 2⁷ = 870539393 is a prime.

It is not a weakly prime, because it can be changed into another prime (870539531) 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, 435269760 + 435269761.

It is an arithmetic number, because the mean of its divisors is an integer number (435269761).

Almost surely, 2^870539521 is an apocalyptic number.

It is an amenable number.

870539521 is a deficient number, since it is larger than the sum of its proper divisors (1).

870539521 is an equidigital number, since it uses as much as digits as its factorization.

870539521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 75600, while the sum is 40.

The square root of 870539521 is about 29504.9067275258. The cubic root of 870539521 is about 954.8375667379.

The spelling of 870539521 in words is "eight hundred seventy million, five hundred thirty-nine thousand, five hundred twenty-one".