6006991 has 2 divisors, whose sum is σ = 6006992. Its totient is φ = 6006990.

The previous prime is 6006961. The next prime is 6007003. The reversal of 6006991 is 1996006.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6006991 - 2⁹ = 6006479 is a prime.

It is a Chen 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 (6006911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3003495 + 3003496.

It is an arithmetic number, because the mean of its divisors is an integer number (3003496).

Almost surely, 2^6006991 is an apocalyptic number.

6006991 is a deficient number, since it is larger than the sum of its proper divisors (1).

6006991 is an equidigital number, since it uses as much as digits as its factorization.

6006991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2916, while the sum is 31.

The square root of 6006991 is about 2450.9163592420. The cubic root of 6006991 is about 181.7826068352.

The spelling of 6006991 in words is "six million, six thousand, nine hundred ninety-one".