183961 has 4 divisors (see below), whose sum is σ = 186624. Its totient is φ = 181300.

The previous prime is 183959. The next prime is 183971. The reversal of 183961 is 169381.

It is a happy number.

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: 169381 = 107 ⋅1583.

It is a cyclic number.

It is not a de Polignac number, because 183961 - 2¹ = 183959 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (183971) 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, 1225 + ... + 1366.

It is an arithmetic number, because the mean of its divisors is an integer number (46656).

2¹⁸³⁹⁶¹ is an apocalyptic number.

It is an amenable number.

183961 is a deficient number, since it is larger than the sum of its proper divisors (2663).

183961 is an equidigital number, since it uses as much as digits as its factorization.

183961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2662.

The product of its digits is 1296, while the sum is 28.

The square root of 183961 is about 428.9067497720. The cubic root of 183961 is about 56.8733208054.

The spelling of 183961 in words is "one hundred eighty-three thousand, nine hundred sixty-one".