830818561 has 2 divisors, whose sum is σ = 830818562. Its totient is φ = 830818560.

The previous prime is 830818519. The next prime is 830818579. The reversal of 830818561 is 165818038.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 826217536 + 4601025 = 28744^2 + 2145^2 .

It is a cyclic number.

It is not a de Polignac number, because 830818561 - 2⁹ = 830818049 is a prime.

It is a super-2 number, since 2×830818561² = 1380518962604221442, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (830818501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 415409280 + 415409281.

It is an arithmetic number, because the mean of its divisors is an integer number (415409281).

Almost surely, 2^830818561 is an apocalyptic number.

It is an amenable number.

830818561 is a deficient number, since it is larger than the sum of its proper divisors (1).

830818561 is an equidigital number, since it uses as much as digits as its factorization.

830818561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46080, while the sum is 40.

The square root of 830818561 is about 28823.9234144139. The cubic root of 830818561 is about 940.0884785435.

The spelling of 830818561 in words is "eight hundred thirty million, eight hundred eighteen thousand, five hundred sixty-one".