190993 has 8 divisors (see below), whose sum is σ = 211680. Its totient is φ = 170880.

The previous prime is 190979. The next prime is 190997. The reversal of 190993 is 399091.

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

It is a cyclic number.

It is not a de Polignac number, because 190993 - 2¹⁷ = 59921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (190997) 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, 978 + ... + 1156.

It is an arithmetic number, because the mean of its divisors is an integer number (26460).

2¹⁹⁰⁹⁹³ is an apocalyptic number.

It is an amenable number.

190993 is a deficient number, since it is larger than the sum of its proper divisors (20687).

190993 is a wasteful number, since it uses less digits than its factorization.

190993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287.

The product of its (nonzero) digits is 2187, while the sum is 31.

The square root of 190993 is about 437.0274590915. The cubic root of 190993 is about 57.5889486578.

It can be divided in two parts, 1909 and 93, that added together give a palindrome (2002).

The spelling of 190993 in words is "one hundred ninety thousand, nine hundred ninety-three".