192131981 has 2 divisors, whose sum is σ = 192131982. Its totient is φ = 192131980.

The previous prime is 192131963. The next prime is 192131999. The reversal of 192131981 is 189131291.

It is a balanced prime because it is at equal distance from previous prime (192131963) and next prime (192131999).

It can be written as a sum of positive squares in only one way, i.e., 164737225 + 27394756 = 12835^2 + 5234^2 .

It is a cyclic number.

It is not a de Polignac number, because 192131981 - 2²² = 187937677 is a prime.

It is a super-2 number, since 2×192131981² = 73829396245968722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (192131921) 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 as a sum of consecutive naturals, namely, 96065990 + 96065991.

It is an arithmetic number, because the mean of its divisors is an integer number (96065991).

Almost surely, 2^192131981 is an apocalyptic number.

It is an amenable number.

192131981 is a deficient number, since it is larger than the sum of its proper divisors (1).

192131981 is an equidigital number, since it uses as much as digits as its factorization.

192131981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 35.

The square root of 192131981 is about 13861.1680965206. The cubic root of 192131981 is about 577.0319850269.

The spelling of 192131981 in words is "one hundred ninety-two million, one hundred thirty-one thousand, nine hundred eighty-one".