2291206791 has 4 divisors (see below), whose sum is σ = 3054942392. Its totient is φ = 1527471192.

The previous prime is 2291206691. The next prime is 2291206829. The reversal of 2291206791 is 1976021922.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2291206791 - 2¹³ = 2291198599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2291206691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 381867796 + ... + 381867801.

It is an arithmetic number, because the mean of its divisors is an integer number (763735598).

Almost surely, 2^2291206791 is an apocalyptic number.

2291206791 is a deficient number, since it is larger than the sum of its proper divisors (763735601).

2291206791 is an equidigital number, since it uses as much as digits as its factorization.

2291206791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 763735600.

The product of its (nonzero) digits is 27216, while the sum is 39.

The square root of 2291206791 is about 47866.5519021373. The cubic root of 2291206791 is about 1318.3217865743.

The spelling of 2291206791 in words is "two billion, two hundred ninety-one million, two hundred six thousand, seven hundred ninety-one".