109868989 has 2 divisors, whose sum is σ = 109868990. Its totient is φ = 109868988.

The previous prime is 109868981. The next prime is 109869031. The reversal of 109868989 is 989868901.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61496964 + 48372025 = 7842^2 + 6955^2 .

It is a cyclic number.

It is not a de Polignac number, because 109868989 - 2³ = 109868981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (109868981) 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, 54934494 + 54934495.

It is an arithmetic number, because the mean of its divisors is an integer number (54934495).

Almost surely, 2^109868989 is an apocalyptic number.

It is an amenable number.

109868989 is a deficient number, since it is larger than the sum of its proper divisors (1).

109868989 is an equidigital number, since it uses as much as digits as its factorization.

109868989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2239488, while the sum is 58.

The square root of 109868989 is about 10481.8409165566. The cubic root of 109868989 is about 478.9516893178.

The spelling of 109868989 in words is "one hundred nine million, eight hundred sixty-eight thousand, nine hundred eighty-nine".