109690129 has 4 divisors (see below), whose sum is σ = 112365540. Its totient is φ = 107014720.

The previous prime is 109690123. The next prime is 109690153. The reversal of 109690129 is 921096901.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 921096901 = 461 ⋅1998041.

It can be written as a sum of positive squares in 2 ways, for example, as 5650129 + 104040000 = 2377^2 + 10200^2 .

It is a cyclic number.

It is not a de Polignac number, because 109690129 - 2⁹ = 109689617 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (109690123) 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, 1337644 + ... + 1337725.

It is an arithmetic number, because the mean of its divisors is an integer number (28091385).

Almost surely, 2^109690129 is an apocalyptic number.

It is an amenable number.

109690129 is a deficient number, since it is larger than the sum of its proper divisors (2675411).

109690129 is an equidigital number, since it uses as much as digits as its factorization.

109690129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2675410.

The product of its (nonzero) digits is 8748, while the sum is 37.

The square root of 109690129 is about 10473.3055431416. The cubic root of 109690129 is about 478.6916467951.

The spelling of 109690129 in words is "one hundred nine million, six hundred ninety thousand, one hundred twenty-nine".