192981681 has 12 divisors (see below), whose sum is σ = 278934708. Its totient is φ = 128569824.

The previous prime is 192981667. The next prime is 192981683. The reversal of 192981681 is 186189291.

It can be written as a sum of positive squares in 2 ways, for example, as 92160000 + 100821681 = 9600^2 + 10041^2 .

It is not a de Polignac number, because 192981681 - 2¹⁰ = 192980657 is a prime.

It is a super-2 number, since 2×192981681² = 74483858403171522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (192981683) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9411 + ... + 21783.

It is an arithmetic number, because the mean of its divisors is an integer number (23244559).

Almost surely, 2^192981681 is an apocalyptic number.

It is an amenable number.

192981681 is a deficient number, since it is larger than the sum of its proper divisors (85953027).

192981681 is a wasteful number, since it uses less digits than its factorization.

192981681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14112 (or 14109 counting only the distinct ones).

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

The square root of 192981681 is about 13891.7846585671. The cubic root of 192981681 is about 577.8813717505.

The spelling of 192981681 in words is "one hundred ninety-two million, nine hundred eighty-one thousand, six hundred eighty-one".