109090789 has 2 divisors, whose sum is σ = 109090790. Its totient is φ = 109090788.

The previous prime is 109090757. The next prime is 109090897. The reversal of 109090789 is 987090901.

Together with next prime (109090897) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 103530625 + 5560164 = 10175^2 + 2358^2 .

It is a cyclic number.

It is not a de Polignac number, because 109090789 - 2⁵ = 109090757 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (109090739) 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, 54545394 + 54545395.

It is an arithmetic number, because the mean of its divisors is an integer number (54545395).

Almost surely, 2^109090789 is an apocalyptic number.

It is an amenable number.

109090789 is a deficient number, since it is larger than the sum of its proper divisors (1).

109090789 is an equidigital number, since it uses as much as digits as its factorization.

109090789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 43.

The square root of 109090789 is about 10444.6536084257. The cubic root of 109090789 is about 477.8182069848.

The spelling of 109090789 in words is "one hundred nine million, ninety thousand, seven hundred eighty-nine".