54643387 has 4 divisors (see below), whose sum is σ = 54662616. Its totient is φ = 54624160.

The previous prime is 54643367. The next prime is 54643397. The reversal of 54643387 is 78334645.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78334645 = 5 ⋅15666929.

It is a cyclic number.

It is not a de Polignac number, because 54643387 - 2¹¹ = 54641339 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54643307) 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, 4414 + ... + 11347.

It is an arithmetic number, because the mean of its divisors is an integer number (13665654).

Almost surely, 2^54643387 is an apocalyptic number.

54643387 is a deficient number, since it is larger than the sum of its proper divisors (19229).

54643387 is a wasteful number, since it uses less digits than its factorization.

54643387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19228.

The product of its digits is 241920, while the sum is 40.

The square root of 54643387 is about 7392.1165439947. The cubic root of 54643387 is about 379.4715345643.

The spelling of 54643387 in words is "fifty-four million, six hundred forty-three thousand, three hundred eighty-seven".