109856871 has 16 divisors (see below), whose sum is σ = 162943200. Its totient is φ = 73151424.

The previous prime is 109856867. The next prime is 109856899. The reversal of 109856871 is 178658901.

109856871 is a `hidden beast` number, since 10 + 9 + 8 + 568 + 71 = 666.

It is not a de Polignac number, because 109856871 - 2² = 109856867 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109856801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27765 + ... + 31473.

It is an arithmetic number, because the mean of its divisors is an integer number (10183950).

Almost surely, 2^109856871 is an apocalyptic number.

109856871 is a deficient number, since it is larger than the sum of its proper divisors (53086329).

109856871 is a wasteful number, since it uses less digits than its factorization.

109856871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4815 (or 4809 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 45.

The square root of 109856871 is about 10481.2628533016. The cubic root of 109856871 is about 478.9340800117.

The spelling of 109856871 in words is "one hundred nine million, eight hundred fifty-six thousand, eight hundred seventy-one".