109821668 has 12 divisors (see below), whose sum is σ = 209659632. Its totient is φ = 49918920.

The previous prime is 109821667. The next prime is 109821689. The reversal of 109821668 is 866128901.

It is not an unprimeable number, because it can be changed into a prime (109821667) 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, 1247930 + ... + 1248017.

It is an arithmetic number, because the mean of its divisors is an integer number (17471636).

Almost surely, 2^109821668 is an apocalyptic number.

It is an amenable number.

109821668 is a deficient number, since it is larger than the sum of its proper divisors (99837964).

109821668 is a wasteful number, since it uses less digits than its factorization.

109821668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2495962 (or 2495960 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 41.

The square root of 109821668 is about 10479.5833886658. The cubic root of 109821668 is about 478.8829173262.

The spelling of 109821668 in words is "one hundred nine million, eight hundred twenty-one thousand, six hundred sixty-eight".