859329521 has 2 divisors, whose sum is σ = 859329522. Its totient is φ = 859329520.

The previous prime is 859329503. The next prime is 859329589. The reversal of 859329521 is 125923958.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 855855025 + 3474496 = 29255^2 + 1864^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-859329521 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (859320521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 429664760 + 429664761.

It is an arithmetic number, because the mean of its divisors is an integer number (429664761).

Almost surely, 2^859329521 is an apocalyptic number.

It is an amenable number.

859329521 is a deficient number, since it is larger than the sum of its proper divisors (1).

859329521 is an equidigital number, since it uses as much as digits as its factorization.

859329521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 194400, while the sum is 44.

The square root of 859329521 is about 29314.3227962032. The cubic root of 859329521 is about 950.7213435515.

The spelling of 859329521 in words is "eight hundred fifty-nine million, three hundred twenty-nine thousand, five hundred twenty-one".