54989 has 4 divisors (see below), whose sum is σ = 60000. Its totient is φ = 49980.

The previous prime is 54983. The next prime is 55001. The reversal of 54989 is 98945.

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 54989 - 2⁴ = 54973 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54983) 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, 2489 + ... + 2510.

It is an arithmetic number, because the mean of its divisors is an integer number (15000).

2⁵⁴⁹⁸⁹ is an apocalyptic number.

It is an amenable number.

54989 is a deficient number, since it is larger than the sum of its proper divisors (5011).

54989 is a wasteful number, since it uses less digits than its factorization.

54989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5010.

The product of its digits is 12960, while the sum is 35.

The square root of 54989 is about 234.4973347397. The cubic root of 54989 is about 38.0269891369.

Subtracting 54989 from its reverse (98945), we obtain a triangular number (43956 = T₂₉₆).

It can be divided in two parts, 5 and 4989, that added together give a palindrome (4994).

The spelling of 54989 in words is "fifty-four thousand, nine hundred eighty-nine".