109091813 has 2 divisors, whose sum is σ = 109091814. Its totient is φ = 109091812.

The previous prime is 109091803. The next prime is 109091819. The reversal of 109091813 is 318190901.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 107288164 + 1803649 = 10358^2 + 1343^2 .

It is a cyclic number.

It is not a de Polignac number, because 109091813 - 2⁸ = 109091557 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 109091813.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (109091819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54545906 + 54545907.

It is an arithmetic number, because the mean of its divisors is an integer number (54545907).

Almost surely, 2^109091813 is an apocalyptic number.

It is an amenable number.

109091813 is a deficient number, since it is larger than the sum of its proper divisors (1).

109091813 is an equidigital number, since it uses as much as digits as its factorization.

109091813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 32.

The square root of 109091813 is about 10444.7026286056. The cubic root of 109091813 is about 477.8197020219.

The spelling of 109091813 in words is "one hundred nine million, ninety-one thousand, eight hundred thirteen".