155983 has 4 divisors (see below), whose sum is σ = 157168. Its totient is φ = 154800.

The previous prime is 155921. The next prime is 156007. The reversal of 155983 is 389551.

155983 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 389551 = 23 ⋅16937.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155983 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155083) 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, 366 + ... + 667.

It is an arithmetic number, because the mean of its divisors is an integer number (39292).

2¹⁵⁵⁹⁸³ is an apocalyptic number.

155983 is a deficient number, since it is larger than the sum of its proper divisors (1185).

155983 is a wasteful number, since it uses less digits than its factorization.

155983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1184.

The product of its digits is 5400, while the sum is 31.

The square root of 155983 is about 394.9468318647. The cubic root of 155983 is about 53.8301706094.

The spelling of 155983 in words is "one hundred fifty-five thousand, nine hundred eighty-three".