51727729 has 2 divisors, whose sum is σ = 51727730. Its totient is φ = 51727728.

The previous prime is 51727721. The next prime is 51727751. The reversal of 51727729 is 92772715.

It is a happy number.

51727729 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 can be written as a sum of positive squares in only one way, i.e., 41152225 + 10575504 = 6415^2 + 3252^2 .

It is a cyclic number.

It is not a de Polignac number, because 51727729 - 2³ = 51727721 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51727691 and 51727700.

It is not a weakly prime, because it can be changed into another prime (51727721) 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, 25863864 + 25863865.

It is an arithmetic number, because the mean of its divisors is an integer number (25863865).

Almost surely, 2^51727729 is an apocalyptic number.

It is an amenable number.

51727729 is a deficient number, since it is larger than the sum of its proper divisors (1).

51727729 is an equidigital number, since it uses as much as digits as its factorization.

51727729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 61740, while the sum is 40.

The square root of 51727729 is about 7192.1991768860. The cubic root of 51727729 is about 372.5985301566.

The spelling of 51727729 in words is "fifty-one million, seven hundred twenty-seven thousand, seven hundred twenty-nine".