109859999989 has 2 divisors, whose sum is σ = 109859999990. Its totient is φ = 109859999988.

The previous prime is 109859999981. The next prime is 109860000049. The reversal of 109859999989 is 989999958901.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98611700625 + 11248299364 = 314025^2 + 106058^2 .

It is a cyclic number.

It is not a de Polignac number, because 109859999989 - 2³ = 109859999981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (109859999981) by changing a digit.

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

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54929999994 + 54929999995.

It is an arithmetic number, because the mean of its divisors is an integer number (54929999995).

Almost surely, 2^109859999989 is an apocalyptic number.

It is an amenable number.

109859999989 is a deficient number, since it is larger than the sum of its proper divisors (1).

109859999989 is an equidigital number, since it uses as much as digits as its factorization.

109859999989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1530550080, while the sum is 85.

The spelling of 109859999989 in words is "one hundred nine billion, eight hundred fifty-nine million, nine hundred ninety-nine thousand, nine hundred eighty-nine".