5371981 has 2 divisors, whose sum is σ = 5371982. Its totient is φ = 5371980.

The previous prime is 5371979. The next prime is 5372011. The reversal of 5371981 is 1891735.

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., 3031081 + 2340900 = 1741^2 + 1530^2 .

It is a cyclic number.

It is not a de Polignac number, because 5371981 - 2¹ = 5371979 is a prime.

It is a super-2 number, since 2×5371981² = 57716359728722, which contains 22 as substring.

Together with 5371979, 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 (5371081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2685990 + 2685991.

It is an arithmetic number, because the mean of its divisors is an integer number (2685991).

Almost surely, 2^5371981 is an apocalyptic number.

It is an amenable number.

5371981 is a deficient number, since it is larger than the sum of its proper divisors (1).

5371981 is an equidigital number, since it uses as much as digits as its factorization.

5371981 is an evil number, because the sum of its binary digits is even.

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

The square root of 5371981 is about 2317.7534381379. The cubic root of 5371981 is about 175.1371007260.

The spelling of 5371981 in words is "five million, three hundred seventy-one thousand, nine hundred eighty-one".