53729513 has 4 divisors (see below), whose sum is σ = 55181700. Its totient is φ = 52277328.

The previous prime is 53729497. The next prime is 53729521. The reversal of 53729513 is 31592735.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31592735 = 5 ⋅6318547.

It can be written as a sum of positive squares in 2 ways, for example, as 48832144 + 4897369 = 6988^2 + 2213^2 .

It is a cyclic number.

It is not a de Polignac number, because 53729513 - 2⁴ = 53729497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53729563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 726038 + ... + 726111.

It is an arithmetic number, because the mean of its divisors is an integer number (13795425).

Almost surely, 2^53729513 is an apocalyptic number.

It is an amenable number.

53729513 is a deficient number, since it is larger than the sum of its proper divisors (1452187).

53729513 is a wasteful number, since it uses less digits than its factorization.

53729513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1452186.

The product of its digits is 28350, while the sum is 35.

The square root of 53729513 is about 7330.0418143419. The cubic root of 53729513 is about 377.3441615141.

The spelling of 53729513 in words is "fifty-three million, seven hundred twenty-nine thousand, five hundred thirteen".