2091791338 has 16 divisors (see below), whose sum is σ = 3861768960. Its totient is φ = 827521776.

The previous prime is 2091791291. The next prime is 2091791347. The reversal of 2091791338 is 8331971902.

It is a junction number, because it is equal to n+sod(n) for n = 2091791294 and 2091791303.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5746498 + ... + 5746861.

It is an arithmetic number, because the mean of its divisors is an integer number (241360560).

Almost surely, 2^2091791338 is an apocalyptic number.

2091791338 is a deficient number, since it is larger than the sum of its proper divisors (1769977622).

2091791338 is a wasteful number, since it uses less digits than its factorization.

2091791338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11493381.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 2091791338 is about 45736.1054091841. The cubic root of 2091791338 is about 1278.9084399267.

The spelling of 2091791338 in words is "two billion, ninety-one million, seven hundred ninety-one thousand, three hundred thirty-eight".