54128717 has 4 divisors (see below), whose sum is σ = 54209820. Its totient is φ = 54047616.

The previous prime is 54128713. The next prime is 54128719. The reversal of 54128717 is 71782145.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71782145 = 5 ⋅14356429.

It can be written as a sum of positive squares in 2 ways, for example, as 10118761 + 44009956 = 3181^2 + 6634^2 .

It is a cyclic number.

It is not a de Polignac number, because 54128717 - 2² = 54128713 is a prime.

It is a super-3 number, since 3×54128717³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54128713) 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, 39542 + ... + 40887.

It is an arithmetic number, because the mean of its divisors is an integer number (13552455).

Almost surely, 2^54128717 is an apocalyptic number.

It is an amenable number.

54128717 is a deficient number, since it is larger than the sum of its proper divisors (81103).

54128717 is an equidigital number, since it uses as much as digits as its factorization.

54128717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81102.

The product of its digits is 15680, while the sum is 35.

The square root of 54128717 is about 7357.2220980476. Note that the first 3 decimals coincide. The cubic root of 54128717 is about 378.2763975119.

It can be divided in two parts, 54128 and 717, that added together give a palindrome (54845).

The spelling of 54128717 in words is "fifty-four million, one hundred twenty-eight thousand, seven hundred seventeen".