109761 has 4 divisors (see below), whose sum is σ = 146352. Its totient is φ = 73172.

The previous prime is 109751. The next prime is 109789. The reversal of 109761 is 167901.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 167901 = 3 ⋅55967.

It is a cyclic number.

It is not a de Polignac number, because 109761 - 2¹¹ = 107713 is a prime.

It is an Ulam number.

It is a D-number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (109721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18291 + ... + 18296.

It is an arithmetic number, because the mean of its divisors is an integer number (36588).

2¹⁰⁹⁷⁶¹ is an apocalyptic number.

It is an amenable number.

109761 is a deficient number, since it is larger than the sum of its proper divisors (36591).

109761 is an equidigital number, since it uses as much as digits as its factorization.

109761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36590.

The product of its (nonzero) digits is 378, while the sum is 24.

The square root of 109761 is about 331.3019770542. The cubic root of 109761 is about 47.8794719126.

The spelling of 109761 in words is "one hundred nine thousand, seven hundred sixty-one".