192981861 has 12 divisors (see below), whose sum is σ = 283476960. Its totient is φ = 126473640.

The previous prime is 192981829. The next prime is 192981871. The reversal of 192981861 is 168189291.

It is not a de Polignac number, because 192981861 - 2⁵ = 192981829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (192981821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 181185 + ... + 182246.

It is an arithmetic number, because the mean of its divisors is an integer number (23623080).

Almost surely, 2^192981861 is an apocalyptic number.

It is an amenable number.

192981861 is a deficient number, since it is larger than the sum of its proper divisors (90495099).

192981861 is a wasteful number, since it uses less digits than its factorization.

192981861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363496 (or 363493 counting only the distinct ones).

The product of its digits is 62208, while the sum is 45.

The square root of 192981861 is about 13891.7911372148. The cubic root of 192981861 is about 577.8815514197.

The spelling of 192981861 in words is "one hundred ninety-two million, nine hundred eighty-one thousand, eight hundred sixty-one".