43387 has 4 divisors (see below), whose sum is σ = 44440. Its totient is φ = 42336.

The previous prime is 43331. The next prime is 43391. The reversal of 43387 is 78334.

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

It is a 5-Lehmer number, since φ(43387) divides (43387-1)⁵.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43387 is a prime.

It is a Duffinian number.

43387 is a modest number, since divided by 387 gives 43 as remainder.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (43397) 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, 462 + ... + 547.

It is an arithmetic number, because the mean of its divisors is an integer number (11110).

2⁴³³⁸⁷ is an apocalyptic number.

43387 is a deficient number, since it is larger than the sum of its proper divisors (1053).

43387 is a wasteful number, since it uses less digits than its factorization.

43387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1052.

The product of its digits is 2016, while the sum is 25.

The square root of 43387 is about 208.2954632247. The cubic root of 43387 is about 35.1387688070.

It can be divided in two parts, 43 and 387, that multiplied together give a square (16641 = 129²).

The spelling of 43387 in words is "forty-three thousand, three hundred eighty-seven".