5818381 has 2 divisors, whose sum is σ = 5818382. Its totient is φ = 5818380.

The previous prime is 5818343. The next prime is 5818391. The reversal of 5818381 is 1838185.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4268356 + 1550025 = 2066^2 + 1245^2 .

It is a cyclic number.

It is not a de Polignac number, because 5818381 - 2⁹ = 5817869 is a prime.

It is a super-2 number, since 2×5818381² = 67707114922322, which contains 22 as substring.

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

5818381 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5818321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2909190 + 2909191.

It is an arithmetic number, because the mean of its divisors is an integer number (2909191).

Almost surely, 2^5818381 is an apocalyptic number.

It is an amenable number.

5818381 is a deficient number, since it is larger than the sum of its proper divisors (1).

5818381 is an equidigital number, since it uses as much as digits as its factorization.

5818381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7680, while the sum is 34.

The square root of 5818381 is about 2412.1320444785. The cubic root of 5818381 is about 179.8597776246.

The spelling of 5818381 in words is "five million, eight hundred eighteen thousand, three hundred eighty-one".