109688549 has 2 divisors, whose sum is σ = 109688550. Its totient is φ = 109688548.

The previous prime is 109688533. The next prime is 109688591. The reversal of 109688549 is 945886901.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94439524 + 15249025 = 9718^2 + 3905^2 .

It is an emirp because it is prime and its reverse (945886901) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 109688549 - 2⁴ = 109688533 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 109688497 and 109688506.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (109688599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54844274 + 54844275.

It is an arithmetic number, because the mean of its divisors is an integer number (54844275).

Almost surely, 2^109688549 is an apocalyptic number.

It is an amenable number.

109688549 is a deficient number, since it is larger than the sum of its proper divisors (1).

109688549 is an equidigital number, since it uses as much as digits as its factorization.

109688549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 622080, while the sum is 50.

The square root of 109688549 is about 10473.2301130072. The cubic root of 109688549 is about 478.6893483919.

The spelling of 109688549 in words is "one hundred nine million, six hundred eighty-eight thousand, five hundred forty-nine".