1811108797 has 2 divisors, whose sum is σ = 1811108798. Its totient is φ = 1811108796.

The previous prime is 1811108777. The next prime is 1811108807. The reversal of 1811108797 is 7978011181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1367964196 + 443144601 = 36986^2 + 21051^2 .

It is a cyclic number.

It is not a de Polignac number, because 1811108797 - 2¹¹ = 1811106749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1811108707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 905554398 + 905554399.

It is an arithmetic number, because the mean of its divisors is an integer number (905554399).

Almost surely, 2^1811108797 is an apocalyptic number.

It is an amenable number.

1811108797 is a deficient number, since it is larger than the sum of its proper divisors (1).

1811108797 is an equidigital number, since it uses as much as digits as its factorization.

1811108797 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28224, while the sum is 43.

The square root of 1811108797 is about 42557.1239277280. The cubic root of 1811108797 is about 1218.9377111987.

The spelling of 1811108797 in words is "one billion, eight hundred eleven million, one hundred eight thousand, seven hundred ninety-seven".