51729539 has 2 divisors, whose sum is σ = 51729540. Its totient is φ = 51729538.

The previous prime is 51729529. The next prime is 51729583. The reversal of 51729539 is 93592715.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51729539 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 51729496 and 51729505.

It is not a weakly prime, because it can be changed into another prime (51729529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25864769 + 25864770.

It is an arithmetic number, because the mean of its divisors is an integer number (25864770).

Almost surely, 2^51729539 is an apocalyptic number.

51729539 is a deficient number, since it is larger than the sum of its proper divisors (1).

51729539 is an equidigital number, since it uses as much as digits as its factorization.

51729539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 85050, while the sum is 41.

The square root of 51729539 is about 7192.3250065608. The cubic root of 51729539 is about 372.6028759591.

The spelling of 51729539 in words is "fifty-one million, seven hundred twenty-nine thousand, five hundred thirty-nine".