5178109 has 8 divisors (see below), whose sum is σ = 5314680. Its totient is φ = 5043456.

The previous prime is 5178091. The next prime is 5178133. The reversal of 5178109 is 9018715.

It can be written as a sum of positive squares in 4 ways, for example, as 324900 + 4853209 = 570^2 + 2203^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 5178109 - 2⁵ = 5178077 is a prime.

It is a Duffinian number.

5178109 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5178139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6099 + ... + 6895.

It is an arithmetic number, because the mean of its divisors is an integer number (664335).

Almost surely, 2^5178109 is an apocalyptic number.

It is an amenable number.

5178109 is a deficient number, since it is larger than the sum of its proper divisors (136571).

5178109 is an equidigital number, since it uses as much as digits as its factorization.

5178109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 959.

The product of its (nonzero) digits is 2520, while the sum is 31.

The square root of 5178109 is about 2275.5458685775. The cubic root of 5178109 is about 173.0043657780.

Subtracting 5178109 from its reverse (9018715), we obtain a triangular number (3840606 = T₂₇₇₁).

The spelling of 5178109 in words is "five million, one hundred seventy-eight thousand, one hundred nine".