109565149 has 2 divisors, whose sum is σ = 109565150. Its totient is φ = 109565148.

The previous prime is 109565047. The next prime is 109565171. The reversal of 109565149 is 941565901.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90117049 + 19448100 = 9493^2 + 4410^2 .

It is an emirp because it is prime and its reverse (941565901) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 109565149 - 2¹⁷ = 109434077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (109565549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54782574 + 54782575.

It is an arithmetic number, because the mean of its divisors is an integer number (54782575).

Almost surely, 2^109565149 is an apocalyptic number.

It is an amenable number.

109565149 is a deficient number, since it is larger than the sum of its proper divisors (1).

109565149 is an equidigital number, since it uses as much as digits as its factorization.

109565149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48600, while the sum is 40.

The square root of 109565149 is about 10467.3372449730. The cubic root of 109565149 is about 478.5097719718.

The spelling of 109565149 in words is "one hundred nine million, five hundred sixty-five thousand, one hundred forty-nine".