55836689 has 2 divisors, whose sum is σ = 55836690. Its totient is φ = 55836688.

The previous prime is 55836659. The next prime is 55836691. The reversal of 55836689 is 98663855.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50523664 + 5313025 = 7108^2 + 2305^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55836689 is a prime.

Together with 55836691, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55836659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27918344 + 27918345.

It is an arithmetic number, because the mean of its divisors is an integer number (27918345).

Almost surely, 2^55836689 is an apocalyptic number.

It is an amenable number.

55836689 is a deficient number, since it is larger than the sum of its proper divisors (1).

55836689 is an equidigital number, since it uses as much as digits as its factorization.

55836689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1555200, while the sum is 50.

The square root of 55836689 is about 7472.3951314154. The cubic root of 55836689 is about 382.2139664584.

The spelling of 55836689 in words is "fifty-five million, eight hundred thirty-six thousand, six hundred eighty-nine".