2049249091 has 4 divisors (see below), whose sum is σ = 2058961384. Its totient is φ = 2039536800.

The previous prime is 2049249077. The next prime is 2049249109. The reversal of 2049249091 is 1909429402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1909429402 = 2 ⋅954714701.

It is a cyclic number.

It is not a de Polignac number, because 2049249091 - 2¹¹ = 2049247043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2049241091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4855830 + ... + 4856251.

It is an arithmetic number, because the mean of its divisors is an integer number (514740346).

Almost surely, 2^2049249091 is an apocalyptic number.

2049249091 is a deficient number, since it is larger than the sum of its proper divisors (9712293).

2049249091 is an equidigital number, since it uses as much as digits as its factorization.

2049249091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9712292.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 2049249091 is about 45268.6325284959. The cubic root of 2049249091 is about 1270.1789672769.

The spelling of 2049249091 in words is "two billion, forty-nine million, two hundred forty-nine thousand, ninety-one".