53509329 has 32 divisors (see below), whose sum is σ = 82262400. Its totient is φ = 34782048.

The previous prime is 53509279. The next prime is 53509331. The reversal of 53509329 is 92390535.

53509329 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 53509329 - 2¹¹ = 53507281 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 53509293 and 53509302.

It is not an unprimeable number, because it can be changed into a prime (53509369) 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 31 ways as a sum of consecutive naturals, for example, 93757 + ... + 94325.

It is an arithmetic number, because the mean of its divisors is an integer number (2570700).

Almost surely, 2^53509329 is an apocalyptic number.

It is an amenable number.

53509329 is a deficient number, since it is larger than the sum of its proper divisors (28753071).

53509329 is an frugal number, since it uses more digits than its factorization.

53509329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 633 (or 615 counting only the distinct ones).

The product of its (nonzero) digits is 36450, while the sum is 36.

The square root of 53509329 is about 7315.0071086773. The cubic root of 53509329 is about 376.8280026047.

The spelling of 53509329 in words is "fifty-three million, five hundred nine thousand, three hundred twenty-nine".