5168981 has 2 divisors, whose sum is σ = 5168982. Its totient is φ = 5168980.

The previous prime is 5168963. The next prime is 5169019. The reversal of 5168981 is 1898615.

It is an a-pointer prime, because the next prime (5169019) can be obtained adding 5168981 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5134756 + 34225 = 2266^2 + 185^2 .

It is a cyclic number.

It is not a de Polignac number, because 5168981 - 2¹⁰ = 5167957 is a prime.

It is a super-2 number, since 2×5168981² = 53436729156722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5168921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2584490 + 2584491.

It is an arithmetic number, because the mean of its divisors is an integer number (2584491).

Almost surely, 2^5168981 is an apocalyptic number.

It is an amenable number.

5168981 is a deficient number, since it is larger than the sum of its proper divisors (1).

5168981 is an equidigital number, since it uses as much as digits as its factorization.

5168981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 38.

The square root of 5168981 is about 2273.5393112942. The cubic root of 5168981 is about 172.9026482918.

The spelling of 5168981 in words is "five million, one hundred sixty-eight thousand, nine hundred eighty-one".