2998991 has 2 divisors, whose sum is σ = 2998992. Its totient is φ = 2998990.

The previous prime is 2998981. The next prime is 2998997. The reversal of 2998991 is 1998992.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2998991 - 2⁶ = 2998927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2998997) 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, 1499495 + 1499496.

It is an arithmetic number, because the mean of its divisors is an integer number (1499496).

2^2998991 is an apocalyptic number.

2998991 is a deficient number, since it is larger than the sum of its proper divisors (1).

2998991 is an equidigital number, since it uses as much as digits as its factorization.

2998991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 104976, while the sum is 47.

The square root of 2998991 is about 1731.7595098627. The cubic root of 2998991 is about 144.2087859975.

Subtracting from 2998991 its reverse (1998992), we obtain a palindrome (999999).

The spelling of 2998991 in words is "two million, nine hundred ninety-eight thousand, nine hundred ninety-one".