52129729 has 2 divisors, whose sum is σ = 52129730. Its totient is φ = 52129728.

The previous prime is 52129723. The next prime is 52129751. The reversal of 52129729 is 92792125.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39690000 + 12439729 = 6300^2 + 3527^2 .

It is a cyclic number.

It is not a de Polignac number, because 52129729 - 2⁷ = 52129601 is a prime.

It is a super-2 number, since 2×52129729² = 5435017291226882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (52129723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26064864 + 26064865.

It is an arithmetic number, because the mean of its divisors is an integer number (26064865).

Almost surely, 2^52129729 is an apocalyptic number.

It is an amenable number.

52129729 is a deficient number, since it is larger than the sum of its proper divisors (1).

52129729 is an equidigital number, since it uses as much as digits as its factorization.

52129729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22680, while the sum is 37.

The square root of 52129729 is about 7220.0920354245. The cubic root of 52129729 is about 373.5612521085.

It can be divided in two parts, 5212 and 9729, that added together give a palindrome (14941).

The spelling of 52129729 in words is "fifty-two million, one hundred twenty-nine thousand, seven hundred twenty-nine".