836228909 has 2 divisors, whose sum is σ = 836228910. Its totient is φ = 836228908.

The previous prime is 836228873. The next prime is 836228923. The reversal of 836228909 is 909822638.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 822427684 + 13801225 = 28678^2 + 3715^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-836228909 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (836221909) 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, 418114454 + 418114455.

It is an arithmetic number, because the mean of its divisors is an integer number (418114455).

Almost surely, 2^836228909 is an apocalyptic number.

It is an amenable number.

836228909 is a deficient number, since it is larger than the sum of its proper divisors (1).

836228909 is an equidigital number, since it uses as much as digits as its factorization.

836228909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 373248, while the sum is 47.

The square root of 836228909 is about 28917.6228103210. The cubic root of 836228909 is about 942.1247053256.

The spelling of 836228909 in words is "eight hundred thirty-six million, two hundred twenty-eight thousand, nine hundred nine".