109610561 has 2 divisors, whose sum is σ = 109610562. Its totient is φ = 109610560.

The previous prime is 109610497. The next prime is 109610623. The reversal of 109610561 is 165016901.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81721600 + 27888961 = 9040^2 + 5281^2 .

It is a cyclic number.

It is not a de Polignac number, because 109610561 - 2⁶ = 109610497 is a prime.

It is a Chen prime.

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

It is not a weakly prime, because it can be changed into another prime (109610461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54805280 + 54805281.

It is an arithmetic number, because the mean of its divisors is an integer number (54805281).

Almost surely, 2^109610561 is an apocalyptic number.

It is an amenable number.

109610561 is a deficient number, since it is larger than the sum of its proper divisors (1).

109610561 is an equidigital number, since it uses as much as digits as its factorization.

109610561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1620, while the sum is 29.

The square root of 109610561 is about 10469.5062443269. The cubic root of 109610561 is about 478.5758729308.

The spelling of 109610561 in words is "one hundred nine million, six hundred ten thousand, five hundred sixty-one".