5812981 has 2 divisors, whose sum is σ = 5812982. Its totient is φ = 5812980.

The previous prime is 5812979. The next prime is 5812991. The reversal of 5812981 is 1892185.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5716881 + 96100 = 2391^2 + 310^2 .

It is a cyclic number.

It is not a de Polignac number, because 5812981 - 2¹ = 5812979 is a prime.

It is a super-2 number, since 2×5812981² = 67581496212722, which contains 22 as substring.

Together with 5812979, it forms a pair of twin primes.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5812931) 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, 2906490 + 2906491.

It is an arithmetic number, because the mean of its divisors is an integer number (2906491).

Almost surely, 2^5812981 is an apocalyptic number.

It is an amenable number.

5812981 is a deficient number, since it is larger than the sum of its proper divisors (1).

5812981 is an equidigital number, since it uses as much as digits as its factorization.

5812981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5760, while the sum is 34.

The square root of 5812981 is about 2411.0124429376. The cubic root of 5812981 is about 179.8041181881.

The spelling of 5812981 in words is "five million, eight hundred twelve thousand, nine hundred eighty-one".