51689347 has 2 divisors, whose sum is σ = 51689348. Its totient is φ = 51689346.

The previous prime is 51689327. The next prime is 51689353. The reversal of 51689347 is 74398615.

51689347 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51689347 - 2⁷ = 51689219 is a prime.

It is not a weakly prime, because it can be changed into another prime (51689317) 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, 25844673 + 25844674.

It is an arithmetic number, because the mean of its divisors is an integer number (25844674).

Almost surely, 2^51689347 is an apocalyptic number.

51689347 is a deficient number, since it is larger than the sum of its proper divisors (1).

51689347 is an equidigital number, since it uses as much as digits as its factorization.

51689347 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 43.

The square root of 51689347 is about 7189.5303740926. The cubic root of 51689347 is about 372.5063512573.

The spelling of 51689347 in words is "fifty-one million, six hundred eighty-nine thousand, three hundred forty-seven".