53500387 has 4 divisors (see below), whose sum is σ = 53859600. Its totient is φ = 53141176.

The previous prime is 53500339. The next prime is 53500393. The reversal of 53500387 is 78300535.

53500387 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, and also an emirpimes, since its reverse is a distinct semiprime: 78300535 = 5 ⋅15660107.

It is a cyclic number.

It is not a de Polignac number, because 53500387 - 2²³ = 45111779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53800387) 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 3 ways as a sum of consecutive naturals, for example, 179383 + ... + 179680.

It is an arithmetic number, because the mean of its divisors is an integer number (13464900).

Almost surely, 2^53500387 is an apocalyptic number.

53500387 is a deficient number, since it is larger than the sum of its proper divisors (359213).

53500387 is a wasteful number, since it uses less digits than its factorization.

53500387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359212.

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 53500387 is about 7314.3958738914. The cubic root of 53500387 is about 376.8070107279.

The spelling of 53500387 in words is "fifty-three million, five hundred thousand, three hundred eighty-seven".