836440061 has 2 divisors, whose sum is σ = 836440062. Its totient is φ = 836440060.

The previous prime is 836440049. The next prime is 836440123. The reversal of 836440061 is 160044638.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 806900836 + 29539225 = 28406^2 + 5435^2 .

It is a cyclic number.

It is not a de Polignac number, because 836440061 - 2¹⁸ = 836177917 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (836440361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 418220030 + 418220031.

It is an arithmetic number, because the mean of its divisors is an integer number (418220031).

Almost surely, 2^836440061 is an apocalyptic number.

It is an amenable number.

836440061 is a deficient number, since it is larger than the sum of its proper divisors (1).

836440061 is an equidigital number, since it uses as much as digits as its factorization.

836440061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 836440061 is about 28921.2735023892. The cubic root of 836440061 is about 942.2039957258.

Adding to 836440061 its reverse (160044638), we get a palindrome (996484699).

The spelling of 836440061 in words is "eight hundred thirty-six million, four hundred forty thousand, sixty-one".