192981 has 4 divisors (see below), whose sum is σ = 257312. Its totient is φ = 128652.

The previous prime is 192979. The next prime is 192991. The reversal of 192981 is 189291.

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: 189291 = 3 ⋅63097.

It is not a de Polignac number, because 192981 - 2¹ = 192979 is a prime.

It is a super-2 number, since 2×192981² = 74483332722, which contains 22 as substring.

It is a D-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 (192931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32161 + ... + 32166.

It is an arithmetic number, because the mean of its divisors is an integer number (64328).

2¹⁹²⁹⁸¹ is an apocalyptic number.

It is an amenable number.

192981 is a deficient number, since it is larger than the sum of its proper divisors (64331).

192981 is an equidigital number, since it uses as much as digits as its factorization.

192981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64330.

The product of its digits is 1296, while the sum is 30.

The square root of 192981 is about 439.2960277535. The cubic root of 192981 is about 57.7880692001.

The spelling of 192981 in words is "one hundred ninety-two thousand, nine hundred eighty-one".