109647 has 16 divisors (see below), whose sum is σ = 168960. Its totient is φ = 70200.

The previous prime is 109639. The next prime is 109661. The reversal of 109647 is 746901.

109647 is a `hidden beast` number, since 10 + 9 + 647 = 666.

It is not a de Polignac number, because 109647 - 2³ = 109639 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 109647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109147) 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, 772 + ... + 902.

It is an arithmetic number, because the mean of its divisors is an integer number (10560).

2¹⁰⁹⁶⁴⁷ is an apocalyptic number.

109647 is a deficient number, since it is larger than the sum of its proper divisors (59313).

109647 is a wasteful number, since it uses less digits than its factorization.

109647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171 (or 165 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 109647 is about 331.1298838824. The cubic root of 109647 is about 47.8628899738.

The spelling of 109647 in words is "one hundred nine thousand, six hundred forty-seven".