109651009 has 4 divisors (see below), whose sum is σ = 118085716. Its totient is φ = 101216304.

The previous prime is 109651007. The next prime is 109651021. The reversal of 109651009 is 900156901.

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 44089600 + 65561409 = 6640^2 + 8097^2 .

It is a cyclic number.

It is not a de Polignac number, because 109651009 - 2¹ = 109651007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (109651007) 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, 4217334 + ... + 4217359.

It is an arithmetic number, because the mean of its divisors is an integer number (29521429).

Almost surely, 2^109651009 is an apocalyptic number.

It is an amenable number.

109651009 is a deficient number, since it is larger than the sum of its proper divisors (8434707).

109651009 is an equidigital number, since it uses as much as digits as its factorization.

109651009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8434706.

The product of its (nonzero) digits is 2430, while the sum is 31.

The square root of 109651009 is about 10471.4377713856. The cubic root of 109651009 is about 478.6347330021.

The spelling of 109651009 in words is "one hundred nine million, six hundred fifty-one thousand, nine".