109013561 has 2 divisors, whose sum is σ = 109013562. Its totient is φ = 109013560.

The previous prime is 109013543. The next prime is 109013563. The reversal of 109013561 is 165310901.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62173225 + 46840336 = 7885^2 + 6844^2 .

It is a cyclic number.

It is not a de Polignac number, because 109013561 - 2⁶ = 109013497 is a prime.

Together with 109013563, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 109013561.

It is not a weakly prime, because it can be changed into another prime (109013563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54506780 + 54506781.

It is an arithmetic number, because the mean of its divisors is an integer number (54506781).

Almost surely, 2^109013561 is an apocalyptic number.

It is an amenable number.

109013561 is a deficient number, since it is larger than the sum of its proper divisors (1).

109013561 is an equidigital number, since it uses as much as digits as its factorization.

109013561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 810, while the sum is 26.

The square root of 109013561 is about 10440.9559428244. The cubic root of 109013561 is about 477.7054273575.

The spelling of 109013561 in words is "one hundred nine million, thirteen thousand, five hundred sixty-one".