5818391 has 2 divisors, whose sum is σ = 5818392. Its totient is φ = 5818390.

The previous prime is 5818381. The next prime is 5818399. The reversal of 5818391 is 1938185.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5818391 is a prime.

It is a super-3 number, since 3×5818391³ (a number of 21 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5818399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2909195 + 2909196.

It is an arithmetic number, because the mean of its divisors is an integer number (2909196).

Almost surely, 2^5818391 is an apocalyptic number.

5818391 is a deficient number, since it is larger than the sum of its proper divisors (1).

5818391 is an equidigital number, since it uses as much as digits as its factorization.

5818391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 35.

The square root of 5818391 is about 2412.1341173326. The cubic root of 5818391 is about 179.8598806656.

The spelling of 5818391 in words is "five million, eight hundred eighteen thousand, three hundred ninety-one".