189755983 has 4 divisors (see below), whose sum is σ = 199743160. Its totient is φ = 179768808.

The previous prime is 189755963. The next prime is 189755987. The reversal of 189755983 is 389557981.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 389557981 = 733 ⋅531457.

It is a cyclic number.

It is not a de Polignac number, because 189755983 - 2⁹ = 189755471 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189755987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4993560 + ... + 4993597.

It is an arithmetic number, because the mean of its divisors is an integer number (49935790).

Almost surely, 2^189755983 is an apocalyptic number.

189755983 is a deficient number, since it is larger than the sum of its proper divisors (9987177).

189755983 is an equidigital number, since it uses as much as digits as its factorization.

189755983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9987176.

The product of its digits is 2721600, while the sum is 55.

The square root of 189755983 is about 13775.1944813857. The cubic root of 189755983 is about 574.6434921755.

The spelling of 189755983 in words is "one hundred eighty-nine million, seven hundred fifty-five thousand, nine hundred eighty-three".