109870561 has 2 divisors, whose sum is σ = 109870562. Its totient is φ = 109870560.

The previous prime is 109870543. The next prime is 109870571. The reversal of 109870561 is 165078901.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 106915600 + 2954961 = 10340^2 + 1719^2 .

It is a cyclic number.

It is not a de Polignac number, because 109870561 - 2⁹ = 109870049 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 109870561.

It is not a weakly prime, because it can be changed into another prime (109870511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54935280 + 54935281.

It is an arithmetic number, because the mean of its divisors is an integer number (54935281).

Almost surely, 2^109870561 is an apocalyptic number.

It is an amenable number.

109870561 is a deficient number, since it is larger than the sum of its proper divisors (1).

109870561 is an equidigital number, since it uses as much as digits as its factorization.

109870561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 37.

The square root of 109870561 is about 10481.9159031162. The cubic root of 109870561 is about 478.9539735791.

The spelling of 109870561 in words is "one hundred nine million, eight hundred seventy thousand, five hundred sixty-one".