51729973 has 2 divisors, whose sum is σ = 51729974. Its totient is φ = 51729972.

The previous prime is 51729949. The next prime is 51729991. The reversal of 51729973 is 37992715.

51729973 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 can be written as a sum of positive squares in only one way, i.e., 35545444 + 16184529 = 5962^2 + 4023^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51729973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51729943) 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, 25864986 + 25864987.

It is an arithmetic number, because the mean of its divisors is an integer number (25864987).

Almost surely, 2^51729973 is an apocalyptic number.

It is an amenable number.

51729973 is a deficient number, since it is larger than the sum of its proper divisors (1).

51729973 is an equidigital number, since it uses as much as digits as its factorization.

51729973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 119070, while the sum is 43.

The square root of 51729973 is about 7192.3551775479. The cubic root of 51729973 is about 372.6039179762.

The spelling of 51729973 in words is "fifty-one million, seven hundred twenty-nine thousand, nine hundred seventy-three".