109661473 has 2 divisors, whose sum is σ = 109661474. Its totient is φ = 109661472.

The previous prime is 109661443. The next prime is 109661491. The reversal of 109661473 is 374166901.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76160529 + 33500944 = 8727^2 + 5788^2 .

It is an emirp because it is prime and its reverse (374166901) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 109661473 - 2⁹ = 109660961 is a prime.

It is not a weakly prime, because it can be changed into another prime (109661423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54830736 + 54830737.

It is an arithmetic number, because the mean of its divisors is an integer number (54830737).

Almost surely, 2^109661473 is an apocalyptic number.

It is an amenable number.

109661473 is a deficient number, since it is larger than the sum of its proper divisors (1).

109661473 is an equidigital number, since it uses as much as digits as its factorization.

109661473 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 109661473 is about 10471.9374043202. The cubic root of 109661473 is about 478.6499578948.

The spelling of 109661473 in words is "one hundred nine million, six hundred sixty-one thousand, four hundred seventy-three".