5317981 has 2 divisors, whose sum is σ = 5317982. Its totient is φ = 5317980.

The previous prime is 5317979. The next prime is 5317997. The reversal of 5317981 is 1897135.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3481956 + 1836025 = 1866^2 + 1355^2 .

It is a cyclic number.

It is not a de Polignac number, because 5317981 - 2¹ = 5317979 is a prime.

It is a super-2 number, since 2×5317981² = 56561843832722, which contains 22 as substring.

Together with 5317979, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5317901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2658990 + 2658991.

It is an arithmetic number, because the mean of its divisors is an integer number (2658991).

Almost surely, 2^5317981 is an apocalyptic number.

It is an amenable number.

5317981 is a deficient number, since it is larger than the sum of its proper divisors (1).

5317981 is an equidigital number, since it uses as much as digits as its factorization.

5317981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7560, while the sum is 34.

The square root of 5317981 is about 2306.0748036436. The cubic root of 5317981 is about 174.5482881008.

The spelling of 5317981 in words is "five million, three hundred seventeen thousand, nine hundred eighty-one".