53642729 has 8 divisors (see below), whose sum is σ = 62311488. Its totient is φ = 45225360.

The previous prime is 53642689. The next prime is 53642737. The reversal of 53642729 is 92724635.

53642729 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 53642729 - 2¹⁶ = 53577193 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 53642692 and 53642701.

It is not an unprimeable number, because it can be changed into a prime (53642749) 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 in 7 ways as a sum of consecutive naturals, for example, 62387 + ... + 63240.

It is an arithmetic number, because the mean of its divisors is an integer number (7788936).

Almost surely, 2^53642729 is an apocalyptic number.

It is an amenable number.

53642729 is a deficient number, since it is larger than the sum of its proper divisors (8668759).

53642729 is a wasteful number, since it uses less digits than its factorization.

53642729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125695.

The product of its digits is 90720, while the sum is 38.

The square root of 53642729 is about 7324.1196740632. The cubic root of 53642729 is about 377.1408897245.

The spelling of 53642729 in words is "fifty-three million, six hundred forty-two thousand, seven hundred twenty-nine".