829845109 has 2 divisors, whose sum is σ = 829845110. Its totient is φ = 829845108.

The previous prime is 829845103. The next prime is 829845127. The reversal of 829845109 is 901548928.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 627352209 + 202492900 = 25047^2 + 14230^2 .

It is a cyclic number.

It is not a de Polignac number, because 829845109 - 2³ = 829845101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (829845101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 414922554 + 414922555.

It is an arithmetic number, because the mean of its divisors is an integer number (414922555).

Almost surely, 2^829845109 is an apocalyptic number.

It is an amenable number.

829845109 is a deficient number, since it is larger than the sum of its proper divisors (1).

829845109 is an equidigital number, since it uses as much as digits as its factorization.

829845109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 207360, while the sum is 46.

The square root of 829845109 is about 28807.0322838018. The cubic root of 829845109 is about 939.7211746585.

The spelling of 829845109 in words is "eight hundred twenty-nine million, eight hundred forty-five thousand, one hundred nine".