83936861 has 2 divisors, whose sum is σ = 83936862. Its totient is φ = 83936860.

The previous prime is 83936857. The next prime is 83936869. The reversal of 83936861 is 16863938.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74822500 + 9114361 = 8650^2 + 3019^2 .

It is a cyclic number.

It is not a de Polignac number, because 83936861 - 2² = 83936857 is a prime.

It is a Sophie Germain 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 (83936869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41968430 + 41968431.

It is an arithmetic number, because the mean of its divisors is an integer number (41968431).

Almost surely, 2^83936861 is an apocalyptic number.

It is an amenable number.

83936861 is a deficient number, since it is larger than the sum of its proper divisors (1).

83936861 is an equidigital number, since it uses as much as digits as its factorization.

83936861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 186624, while the sum is 44.

The square root of 83936861 is about 9161.7062275539. The cubic root of 83936861 is about 437.8421569372.

The spelling of 83936861 in words is "eighty-three million, nine hundred thirty-six thousand, eight hundred sixty-one".