829695661 has 2 divisors, whose sum is σ = 829695662. Its totient is φ = 829695660.

The previous prime is 829695631. The next prime is 829695673. The reversal of 829695661 is 166596928.

829695661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 821911561 + 7784100 = 28669^2 + 2790^2 .

It is a cyclic number.

It is not a de Polignac number, because 829695661 - 2¹⁹ = 829171373 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 829695599 and 829695608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (829695631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 414847830 + 414847831.

It is an arithmetic number, because the mean of its divisors is an integer number (414847831).

Almost surely, 2^829695661 is an apocalyptic number.

It is an amenable number.

829695661 is a deficient number, since it is larger than the sum of its proper divisors (1).

829695661 is an equidigital number, since it uses as much as digits as its factorization.

829695661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1399680, while the sum is 52.

The square root of 829695661 is about 28804.4382170526. The cubic root of 829695661 is about 939.6647593588.

The spelling of 829695661 in words is "eight hundred twenty-nine million, six hundred ninety-five thousand, six hundred sixty-one".