829889869 has 2 divisors, whose sum is σ = 829889870. Its totient is φ = 829889868.

The previous prime is 829889807. The next prime is 829889917. The reversal of 829889869 is 968988928.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 586124100 + 243765769 = 24210^2 + 15613^2 .

It is a cyclic number.

It is not a de Polignac number, because 829889869 - 2¹⁵ = 829857101 is a prime.

It is a super-2 number, since 2×829889869² = 1377434389337674322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (829889069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 414944934 + 414944935.

It is an arithmetic number, because the mean of its divisors is an integer number (414944935).

Almost surely, 2^829889869 is an apocalyptic number.

It is an amenable number.

829889869 is a deficient number, since it is larger than the sum of its proper divisors (1).

829889869 is an equidigital number, since it uses as much as digits as its factorization.

829889869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 35831808, while the sum is 67.

The square root of 829889869 is about 28807.8091669603. The cubic root of 829889869 is about 939.7380698450.

The spelling of 829889869 in words is "eight hundred twenty-nine million, eight hundred eighty-nine thousand, eight hundred sixty-nine".