836861131 has 2 divisors, whose sum is σ = 836861132. Its totient is φ = 836861130.

The previous prime is 836861119. The next prime is 836861147. The reversal of 836861131 is 131168638.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-836861131 is a prime.

It is a super-3 number, since 3×836861131³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (836861101) 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, 418430565 + 418430566.

It is an arithmetic number, because the mean of its divisors is an integer number (418430566).

Almost surely, 2^836861131 is an apocalyptic number.

836861131 is a deficient number, since it is larger than the sum of its proper divisors (1).

836861131 is an equidigital number, since it uses as much as digits as its factorization.

836861131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 37.

The square root of 836861131 is about 28928.5521760077. The cubic root of 836861131 is about 942.3620733138.

The spelling of 836861131 in words is "eight hundred thirty-six million, eight hundred sixty-one thousand, one hundred thirty-one".