2091144049 has 2 divisors, whose sum is σ = 2091144050. Its totient is φ = 2091144048.

The previous prime is 2091144031. The next prime is 2091144053. The reversal of 2091144049 is 9404411902.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1861318449 + 229825600 = 43143^2 + 15160^2 .

It is a cyclic number.

It is not a de Polignac number, because 2091144049 - 2⁵ = 2091144017 is a prime.

It is a super-2 number, since 2×2091144049² = 8745766867336228802, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2091144019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1045572024 + 1045572025.

It is an arithmetic number, because the mean of its divisors is an integer number (1045572025).

Almost surely, 2^2091144049 is an apocalyptic number.

It is an amenable number.

2091144049 is a deficient number, since it is larger than the sum of its proper divisors (1).

2091144049 is an equidigital number, since it uses as much as digits as its factorization.

2091144049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 2091144049 is about 45729.0285158126. The cubic root of 2091144049 is about 1278.7765101380.

The spelling of 2091144049 in words is "two billion, ninety-one million, one hundred forty-four thousand, forty-nine".