109947 has 8 divisors (see below), whose sum is σ = 149056. Its totient is φ = 72072.

The previous prime is 109943. The next prime is 109961. The reversal of 109947 is 749901.

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

It is not a de Polignac number, because 109947 - 2² = 109943 is a prime.

It is a Duffinian number.

109947 is a lucky number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (109943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73 + ... + 474.

It is an arithmetic number, because the mean of its divisors is an integer number (18632).

2¹⁰⁹⁹⁴⁷ is an apocalyptic number.

109947 is a deficient number, since it is larger than the sum of its proper divisors (39109).

109947 is an equidigital number, since it uses as much as digits as its factorization.

109947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617.

The product of its (nonzero) digits is 2268, while the sum is 30.

The square root of 109947 is about 331.5825689025. The cubic root of 109947 is about 47.9065020237.

The spelling of 109947 in words is "one hundred nine thousand, nine hundred forty-seven".