836864393 has 2 divisors, whose sum is σ = 836864394. Its totient is φ = 836864392.

The previous prime is 836864359. The next prime is 836864401. The reversal of 836864393 is 393468638.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 776848384 + 60016009 = 27872^2 + 7747^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-836864393 is a prime.

It is not a weakly prime, because it can be changed into another prime (836864333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 418432196 + 418432197.

It is an arithmetic number, because the mean of its divisors is an integer number (418432197).

Almost surely, 2^836864393 is an apocalyptic number.

It is an amenable number.

836864393 is a deficient number, since it is larger than the sum of its proper divisors (1).

836864393 is an equidigital number, since it uses as much as digits as its factorization.

836864393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2239488, while the sum is 50.

The square root of 836864393 is about 28928.6085562372. The cubic root of 836864393 is about 942.3632977229.

The spelling of 836864393 in words is "eight hundred thirty-six million, eight hundred sixty-four thousand, three hundred ninety-three".