109720646 has 16 divisors (see below), whose sum is σ = 188252160. Its totient is φ = 46983240.

The previous prime is 109720609. The next prime is 109720657. The reversal of 109720646 is 646027901.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18875 + ... + 23993.

It is an arithmetic number, because the mean of its divisors is an integer number (11765760).

Almost surely, 2^109720646 is an apocalyptic number.

109720646 is a deficient number, since it is larger than the sum of its proper divisors (78531514).

109720646 is a wasteful number, since it uses less digits than its factorization.

109720646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6659.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 109720646 is about 10474.7623362060. The cubic root of 109720646 is about 478.7360351054.

The spelling of 109720646 in words is "one hundred nine million, seven hundred twenty thousand, six hundred forty-six".