109181573 has 2 divisors, whose sum is σ = 109181574. Its totient is φ = 109181572.

The previous prime is 109181563. The next prime is 109181609. The reversal of 109181573 is 375181901.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 108847489 + 334084 = 10433^2 + 578^2 .

It is an emirp because it is prime and its reverse (375181901) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 109181573 - 2¹⁸ = 108919429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (109181563) 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, 54590786 + 54590787.

It is an arithmetic number, because the mean of its divisors is an integer number (54590787).

Almost surely, 2^109181573 is an apocalyptic number.

It is an amenable number.

109181573 is a deficient number, since it is larger than the sum of its proper divisors (1).

109181573 is an equidigital number, since it uses as much as digits as its factorization.

109181573 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7560, while the sum is 35.

The square root of 109181573 is about 10448.9986601588. The cubic root of 109181573 is about 477.9507150273.

The spelling of 109181573 in words is "one hundred nine million, one hundred eighty-one thousand, five hundred seventy-three".