836664109 has 2 divisors, whose sum is σ = 836664110. Its totient is φ = 836664108.

The previous prime is 836664067. The next prime is 836664113. The reversal of 836664109 is 901466638.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 578162025 + 258502084 = 24045^2 + 16078^2 .

It is a cyclic number.

It is not a de Polignac number, because 836664109 - 2¹³ = 836655917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (836664149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 418332054 + 418332055.

It is an arithmetic number, because the mean of its divisors is an integer number (418332055).

Almost surely, 2^836664109 is an apocalyptic number.

It is an amenable number.

836664109 is a deficient number, since it is larger than the sum of its proper divisors (1).

836664109 is an equidigital number, since it uses as much as digits as its factorization.

836664109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 186624, while the sum is 43.

The square root of 836664109 is about 28925.1466547708. The cubic root of 836664109 is about 942.2881141563.

The spelling of 836664109 in words is "eight hundred thirty-six million, six hundred sixty-four thousand, one hundred nine".