54988993 has 4 divisors (see below), whose sum is σ = 56475220. Its totient is φ = 53502768.

The previous prime is 54988991. The next prime is 54989023. The reversal of 54988993 is 39988945.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39988945 = 5 ⋅7997789.

It can be written as a sum of positive squares in 2 ways, for example, as 40297104 + 14691889 = 6348^2 + 3833^2 .

It is a cyclic number.

It is not a de Polignac number, because 54988993 - 2¹ = 54988991 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54988991) 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, 743058 + ... + 743131.

It is an arithmetic number, because the mean of its divisors is an integer number (14118805).

Almost surely, 2^54988993 is an apocalyptic number.

It is an amenable number.

54988993 is a deficient number, since it is larger than the sum of its proper divisors (1486227).

54988993 is a wasteful number, since it uses less digits than its factorization.

54988993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1486226.

The product of its digits is 2799360, while the sum is 55.

The square root of 54988993 is about 7415.4563581751. The cubic root of 54988993 is about 380.2698752335.

The spelling of 54988993 in words is "fifty-four million, nine hundred eighty-eight thousand, nine hundred ninety-three".