109549549 has 4 divisors (see below), whose sum is σ = 110634300. Its totient is φ = 108464800.

The previous prime is 109549543. The next prime is 109549553. The reversal of 109549549 is 945945901.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 945945901 = 101 ⋅9365801.

It can be written as a sum of positive squares in 2 ways, for example, as 67947049 + 41602500 = 8243^2 + 6450^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-109549549 is a prime.

It is a super-2 number, since 2×109549549² = 24002207372206802, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 109549499 and 109549508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109549543) 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 in 3 ways as a sum of consecutive naturals, for example, 542224 + ... + 542425.

It is an arithmetic number, because the mean of its divisors is an integer number (27658575).

Almost surely, 2^109549549 is an apocalyptic number.

It is an amenable number.

109549549 is a deficient number, since it is larger than the sum of its proper divisors (1084751).

109549549 is a wasteful number, since it uses less digits than its factorization.

109549549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1084750.

The product of its (nonzero) digits is 291600, while the sum is 46.

The square root of 109549549 is about 10466.5920432584. The cubic root of 109549549 is about 478.4870606540.

It can be divided in two parts, 10954 and 9549, that added together give a triangular number (20503 = T₂₀₂).

The spelling of 109549549 in words is "one hundred nine million, five hundred forty-nine thousand, five hundred forty-nine".