109096821 has 16 divisors (see below), whose sum is σ = 163841920. Its totient is φ = 71733600.

The previous prime is 109096817. The next prime is 109096829. The reversal of 109096821 is 128690901.

It is not a de Polignac number, because 109096821 - 2² = 109096817 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 (109096829) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25705 + ... + 29646.

It is an arithmetic number, because the mean of its divisors is an integer number (10240120).

Almost surely, 2^109096821 is an apocalyptic number.

It is an amenable number.

109096821 is a deficient number, since it is larger than the sum of its proper divisors (54745099).

109096821 is an equidigital number, since it uses as much as digits as its factorization.

109096821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55433 (or 55427 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The square root of 109096821 is about 10444.9423646088. The cubic root of 109096821 is about 477.8270135527.

The spelling of 109096821 in words is "one hundred nine million, ninety-six thousand, eight hundred twenty-one".