109945609 has 4 divisors (see below), whose sum is σ = 115732240. Its totient is φ = 104158980.

The previous prime is 109945597. The next prime is 109945631. The reversal of 109945609 is 906549901.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 109945609 - 2¹³ = 109937417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (109945639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2893287 + ... + 2893324.

It is an arithmetic number, because the mean of its divisors is an integer number (28933060).

Almost surely, 2^109945609 is an apocalyptic number.

109945609 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

109945609 is a deficient number, since it is larger than the sum of its proper divisors (5786631).

109945609 is an equidigital number, since it uses as much as digits as its factorization.

109945609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5786630.

The product of its (nonzero) digits is 87480, while the sum is 43.

The square root of 109945609 is about 10485.4951719029. The cubic root of 109945609 is about 479.0629999235.

The spelling of 109945609 in words is "one hundred nine million, nine hundred forty-five thousand, six hundred nine".