109906643 has 8 divisors (see below), whose sum is σ = 137026560. Its totient is φ = 85641480.

The previous prime is 109906637. The next prime is 109906661. The reversal of 109906643 is 346609901.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 109906643 - 2⁶ = 109906579 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 109906597 and 109906606.

It is not an unprimeable number, because it can be changed into a prime (109906663) 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 7 ways as a sum of consecutive naturals, for example, 713603 + ... + 713756.

It is an arithmetic number, because the mean of its divisors is an integer number (17128320).

Almost surely, 2^109906643 is an apocalyptic number.

109906643 is a deficient number, since it is larger than the sum of its proper divisors (27119917).

109906643 is a wasteful number, since it uses less digits than its factorization.

109906643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1427377.

The product of its (nonzero) digits is 34992, while the sum is 38.

The square root of 109906643 is about 10483.6369166430. The cubic root of 109906643 is about 479.0063980735.

The spelling of 109906643 in words is "one hundred nine million, nine hundred six thousand, six hundred forty-three".