5005991 has 2 divisors, whose sum is σ = 5005992. Its totient is φ = 5005990.

The previous prime is 5005981. The next prime is 5006003. The reversal of 5005991 is 1995005.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 5005991 - 2¹⁸ = 4743847 is a prime.

It is a super-3 number, since 3×5005991³ (a number of 21 digits) contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5005921) 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, 2502995 + 2502996.

It is an arithmetic number, because the mean of its divisors is an integer number (2502996).

Almost surely, 2^5005991 is an apocalyptic number.

5005991 is a deficient number, since it is larger than the sum of its proper divisors (1).

5005991 is an equidigital number, since it uses as much as digits as its factorization.

5005991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2025, while the sum is 29.

The square root of 5005991 is about 2237.4072047797. The cubic root of 5005991 is about 171.0658638475.

The spelling of 5005991 in words is "five million, five thousand, nine hundred ninety-one".