830736521 has 2 divisors, whose sum is σ = 830736522. Its totient is φ = 830736520.

The previous prime is 830736503. The next prime is 830736527. The reversal of 830736521 is 125637038.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 758231296 + 72505225 = 27536^2 + 8515^2 .

It is a cyclic number.

It is not a de Polignac number, because 830736521 - 2¹⁸ = 830474377 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (830736527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 415368260 + 415368261.

It is an arithmetic number, because the mean of its divisors is an integer number (415368261).

Almost surely, 2^830736521 is an apocalyptic number.

It is an amenable number.

830736521 is a deficient number, since it is larger than the sum of its proper divisors (1).

830736521 is an equidigital number, since it uses as much as digits as its factorization.

830736521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 830736521 is about 28822.5002558765. The cubic root of 830736521 is about 940.0575342029.

The spelling of 830736521 in words is "eight hundred thirty million, seven hundred thirty-six thousand, five hundred twenty-one".