109523749 has 4 divisors (see below), whose sum is σ = 113300460. Its totient is φ = 105747040.

The previous prime is 109523719. The next prime is 109523759. The reversal of 109523749 is 947325901.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 79744900 + 29778849 = 8930^2 + 5457^2 .

It is a cyclic number.

It is not a de Polignac number, because 109523749 - 2⁵ = 109523717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109523719) 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 in 3 ways as a sum of consecutive naturals, for example, 1888312 + ... + 1888369.

It is an arithmetic number, because the mean of its divisors is an integer number (28325115).

Almost surely, 2^109523749 is an apocalyptic number.

It is an amenable number.

109523749 is a deficient number, since it is larger than the sum of its proper divisors (3776711).

109523749 is an equidigital number, since it uses as much as digits as its factorization.

109523749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3776710.

The product of its (nonzero) digits is 68040, while the sum is 40.

The square root of 109523749 is about 10465.3594778201. The cubic root of 109523749 is about 478.4494948964.

The spelling of 109523749 in words is "one hundred nine million, five hundred twenty-three thousand, seven hundred forty-nine".