53129785 has 4 divisors (see below), whose sum is σ = 63755748. Its totient is φ = 42503824.

The previous prime is 53129773. The next prime is 53129807. The reversal of 53129785 is 58792135.

53129785 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 24088464 + 29041321 = 4908^2 + 5389^2 .

It is a cyclic number.

It is not a de Polignac number, because 53129785 - 2⁹ = 53129273 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 5312974 + ... + 5312983.

It is an arithmetic number, because the mean of its divisors is an integer number (15938937).

Almost surely, 2^53129785 is an apocalyptic number.

It is an amenable number.

53129785 is a deficient number, since it is larger than the sum of its proper divisors (10625963).

53129785 is a wasteful number, since it uses less digits than its factorization.

53129785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10625962.

The product of its digits is 75600, while the sum is 40.

The square root of 53129785 is about 7289.0181094575. The cubic root of 53129785 is about 375.9349352671.

The spelling of 53129785 in words is "fifty-three million, one hundred twenty-nine thousand, seven hundred eighty-five".