109419921 has 12 divisors (see below), whose sum is σ = 170208948. Its totient is φ = 67335264.

The previous prime is 109419913. The next prime is 109419941. The reversal of 109419921 is 129914901.

It can be written as a sum of positive squares in 2 ways, for example, as 13771521 + 95648400 = 3711^2 + 9780^2 .

It is not a de Polignac number, because 109419921 - 2³ = 109419913 is a prime.

It is a super-2 number, since 2×109419921² = 23945438223292482, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (109419941) 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 11 ways as a sum of consecutive naturals, for example, 467490 + ... + 467723.

It is an arithmetic number, because the mean of its divisors is an integer number (14184079).

Almost surely, 2^109419921 is an apocalyptic number.

It is an amenable number.

109419921 is a deficient number, since it is larger than the sum of its proper divisors (60789027).

109419921 is a wasteful number, since it uses less digits than its factorization.

109419921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 935232 (or 935229 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 36.

The square root of 109419921 is about 10460.3977457839. The cubic root of 109419921 is about 478.2982578038.

The spelling of 109419921 in words is "one hundred nine million, four hundred nineteen thousand, nine hundred twenty-one".