5178869 has 2 divisors, whose sum is σ = 5178870. Its totient is φ = 5178868.

The previous prime is 5178857. The next prime is 5178871. The reversal of 5178869 is 9688715.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2739025 + 2439844 = 1655^2 + 1562^2 .

It is a cyclic number.

It is not a de Polignac number, because 5178869 - 2¹² = 5174773 is a prime.

It is a super-2 number, since 2×5178869² = 53641368238322, which contains 22 as substring.

Together with 5178871, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5178809) 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 as a sum of consecutive naturals, namely, 2589434 + 2589435.

It is an arithmetic number, because the mean of its divisors is an integer number (2589435).

Almost surely, 2^5178869 is an apocalyptic number.

It is an amenable number.

5178869 is a deficient number, since it is larger than the sum of its proper divisors (1).

5178869 is an equidigital number, since it uses as much as digits as its factorization.

5178869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 44.

The square root of 5178869 is about 2275.7128553488. The cubic root of 5178869 is about 173.0128294138.

The spelling of 5178869 in words is "five million, one hundred seventy-eight thousand, eight hundred sixty-nine".