54643993 has 4 divisors (see below), whose sum is σ = 54754000. Its totient is φ = 54533988.

The previous prime is 54643991. The next prime is 54643999. The reversal of 54643993 is 39934645.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 54643993 - 2¹ = 54643991 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54643991) 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, 54255 + ... + 55252.

It is an arithmetic number, because the mean of its divisors is an integer number (13688500).

Almost surely, 2^54643993 is an apocalyptic number.

It is an amenable number.

54643993 is a deficient number, since it is larger than the sum of its proper divisors (110007).

54643993 is a wasteful number, since it uses less digits than its factorization.

54643993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110006.

The product of its digits is 349920, while the sum is 43.

The square root of 54643993 is about 7392.1575334945. The cubic root of 54643993 is about 379.4729373501.

The spelling of 54643993 in words is "fifty-four million, six hundred forty-three thousand, nine hundred ninety-three".