100647 has 12 divisors (see below), whose sum is σ = 148824. Its totient is φ = 65520.

The previous prime is 100621. The next prime is 100649. The reversal of 100647 is 746001.

It is not a de Polignac number, because 100647 - 2⁷ = 100519 is a prime.

It is a Smith number, since the sum of its digits (18) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 100647.

It is not an unprimeable number, because it can be changed into a prime (100649) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 372 + ... + 582.

It is an arithmetic number, because the mean of its divisors is an integer number (12402).

2¹⁰⁰⁶⁴⁷ is an apocalyptic number.

100647 is the 159-th decagonal number.

100647 is a deficient number, since it is larger than the sum of its proper divisors (48177).

100647 is a wasteful number, since it uses less digits than its factorization.

100647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270 (or 267 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 100647 is about 317.2491134739. The cubic root of 100647 is about 46.5157768179.

Adding to 100647 its reverse (746001), we get a palindrome (846648).

It can be divided in two parts, 100 and 647, that added together give a palindrome (747).

The spelling of 100647 in words is "one hundred thousand, six hundred forty-seven".