830535521 has 2 divisors, whose sum is σ = 830535522. Its totient is φ = 830535520.

The previous prime is 830535491. The next prime is 830535523. The reversal of 830535521 is 125535038.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 814246225 + 16289296 = 28535^2 + 4036^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-830535521 is a prime.

Together with 830535523, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (830535523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 415267760 + 415267761.

It is an arithmetic number, because the mean of its divisors is an integer number (415267761).

Almost surely, 2^830535521 is an apocalyptic number.

It is an amenable number.

830535521 is a deficient number, since it is larger than the sum of its proper divisors (1).

830535521 is an equidigital number, since it uses as much as digits as its factorization.

830535521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18000, while the sum is 32.

The square root of 830535521 is about 28819.0131857425. The cubic root of 830535521 is about 939.9817112029.

The spelling of 830535521 in words is "eight hundred thirty million, five hundred thirty-five thousand, five hundred twenty-one".