109821669 has 4 divisors (see below), whose sum is σ = 146428896. Its totient is φ = 73214444.

The previous prime is 109821667. The next prime is 109821689. The reversal of 109821669 is 966128901.

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 109821669 - 2¹ = 109821667 is a prime.

It is a super-2 number, since 2×109821669² = 24121597963891122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 109821669.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109821667) 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, 18303609 + ... + 18303614.

It is an arithmetic number, because the mean of its divisors is an integer number (36607224).

Almost surely, 2^109821669 is an apocalyptic number.

It is an amenable number.

109821669 is a deficient number, since it is larger than the sum of its proper divisors (36607227).

109821669 is an equidigital number, since it uses as much as digits as its factorization.

109821669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36607226.

The product of its (nonzero) digits is 46656, while the sum is 42.

The square root of 109821669 is about 10479.5834363776. The cubic root of 109821669 is about 478.8829187797.

The spelling of 109821669 in words is "one hundred nine million, eight hundred twenty-one thousand, six hundred sixty-nine".