109639193 has 2 divisors, whose sum is σ = 109639194. Its totient is φ = 109639192.

The previous prime is 109639141. The next prime is 109639199. The reversal of 109639193 is 391936901.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77228944 + 32410249 = 8788^2 + 5693^2 .

It is a cyclic number.

It is not a de Polignac number, because 109639193 - 2⁶ = 109639129 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 109639193.

It is not a weakly prime, because it can be changed into another prime (109639199) 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, 54819596 + 54819597.

It is an arithmetic number, because the mean of its divisors is an integer number (54819597).

Almost surely, 2^109639193 is an apocalyptic number.

It is an amenable number.

109639193 is a deficient number, since it is larger than the sum of its proper divisors (1).

109639193 is an equidigital number, since it uses as much as digits as its factorization.

109639193 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 39366, while the sum is 41.

The square root of 109639193 is about 10470.8735547709. The cubic root of 109639193 is about 478.6175398143.

The spelling of 109639193 in words is "one hundred nine million, six hundred thirty-nine thousand, one hundred ninety-three".