109621985 has 8 divisors (see below), whose sum is σ = 143505216. Its totient is φ = 79725040.

The previous prime is 109621957. The next prime is 109621997. The reversal of 109621985 is 589126901.

It is a happy number.

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

It is not a de Polignac number, because 109621985 - 2¹² = 109617889 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 996509 + ... + 996618.

It is an arithmetic number, because the mean of its divisors is an integer number (17938152).

Almost surely, 2^109621985 is an apocalyptic number.

It is an amenable number.

109621985 is a deficient number, since it is larger than the sum of its proper divisors (33883231).

109621985 is a wasteful number, since it uses less digits than its factorization.

109621985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1993143.

The product of its (nonzero) digits is 38880, while the sum is 41.

The square root of 109621985 is about 10470.0518145805. The cubic root of 109621985 is about 478.5924986427.

The spelling of 109621985 in words is "one hundred nine million, six hundred twenty-one thousand, nine hundred eighty-five".