51686683 has 2 divisors, whose sum is σ = 51686684. Its totient is φ = 51686682.

The previous prime is 51686659. The next prime is 51686711. The reversal of 51686683 is 38668615.

51686683 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51686683 - 2²¹ = 49589531 is a prime.

It is not a weakly prime, because it can be changed into another prime (51684683) 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, 25843341 + 25843342.

It is an arithmetic number, because the mean of its divisors is an integer number (25843342).

Almost surely, 2^51686683 is an apocalyptic number.

51686683 is a deficient number, since it is larger than the sum of its proper divisors (1).

51686683 is an equidigital number, since it uses as much as digits as its factorization.

51686683 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 207360, while the sum is 43.

The square root of 51686683 is about 7189.3451023024. The cubic root of 51686683 is about 372.4999516538.

The spelling of 51686683 in words is "fifty-one million, six hundred eighty-six thousand, six hundred eighty-three".