2981991899 has 2 divisors, whose sum is σ = 2981991900. Its totient is φ = 2981991898.

The previous prime is 2981991889. The next prime is 2981991923. The reversal of 2981991899 is 9981991892.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2981991899 - 2⁸ = 2981991643 is a prime.

It is not a weakly prime, because it can be changed into another prime (2981991839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1490995949 + 1490995950.

It is an arithmetic number, because the mean of its divisors is an integer number (1490995950).

Almost surely, 2^2981991899 is an apocalyptic number.

2981991899 is a deficient number, since it is larger than the sum of its proper divisors (1).

2981991899 is an equidigital number, since it uses as much as digits as its factorization.

2981991899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7558272, while the sum is 65.

The square root of 2981991899 is about 54607.6175913215. The cubic root of 2981991899 is about 1439.3579794564.

The spelling of 2981991899 in words is "two billion, nine hundred eighty-one million, nine hundred ninety-one thousand, eight hundred ninety-nine".