2000004991 has 2 divisors, whose sum is σ = 2000004992. Its totient is φ = 2000004990.

The previous prime is 2000004983. The next prime is 2000005003. The reversal of 2000004991 is 1994000002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2000004991 - 2³ = 2000004983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2000034991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000002495 + 1000002496.

It is an arithmetic number, because the mean of its divisors is an integer number (1000002496).

Almost surely, 2^2000004991 is an apocalyptic number.

2000004991 is a deficient number, since it is larger than the sum of its proper divisors (1).

2000004991 is an equidigital number, since it uses as much as digits as its factorization.

2000004991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 2000004991 is about 44721.4153510374. The cubic root of 2000004991 is about 1259.9220979383.

Adding to 2000004991 its reverse (1994000002), we get a palindrome (3994004993).

The spelling of 2000004991 in words is "two billion, four thousand, nine hundred ninety-one".