53437729 has 2 divisors, whose sum is σ = 53437730. Its totient is φ = 53437728.

The previous prime is 53437721. The next prime is 53437751. The reversal of 53437729 is 92773435.

53437729 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., 40297104 + 13140625 = 6348^2 + 3625^2 .

It is a cyclic number.

It is not a de Polignac number, because 53437729 - 2³ = 53437721 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 53437691 and 53437700.

It is not a weakly prime, because it can be changed into another prime (53437721) 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, 26718864 + 26718865.

It is an arithmetic number, because the mean of its divisors is an integer number (26718865).

Almost surely, 2^53437729 is an apocalyptic number.

It is an amenable number.

53437729 is a deficient number, since it is larger than the sum of its proper divisors (1).

53437729 is an equidigital number, since it uses as much as digits as its factorization.

53437729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 158760, while the sum is 40.

The square root of 53437729 is about 7310.1114218595. Note that the first 3 decimals coincide. The cubic root of 53437729 is about 376.6598516879.

The spelling of 53437729 in words is "fifty-three million, four hundred thirty-seven thousand, seven hundred twenty-nine".