53387 has 4 divisors (see below), whose sum is σ = 53856. Its totient is φ = 52920.

The previous prime is 53381. The next prime is 53401. The reversal of 53387 is 78335.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 78335 = 5 ⋅15667.

It is a cyclic number.

It is not a de Polignac number, because 53387 - 2⁶ = 53323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62 + ... + 332.

It is an arithmetic number, because the mean of its divisors is an integer number (13464).

2⁵³³⁸⁷ is an apocalyptic number.

53387 is a deficient number, since it is larger than the sum of its proper divisors (469).

53387 is a wasteful number, since it uses less digits than its factorization.

53387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468.

The product of its digits is 2520, while the sum is 26.

The square root of 53387 is about 231.0562702027. The cubic root of 53387 is about 37.6540624895.

Subtracting from 53387 its sum of digits (26), we obtain a square (53361 = 231²).

The spelling of 53387 in words is "fifty-three thousand, three hundred eighty-seven".