196938681 has 16 divisors (see below), whose sum is σ = 272674560. Its totient is φ = 126282240.

The previous prime is 196938653. The next prime is 196938689. The reversal of 196938681 is 186839691.

It is not a de Polignac number, because 196938681 - 2⁵ = 196938649 is a prime.

It is a super-2 number, since 2×196938681² = 77569688148039522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (196938689) 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 in 15 ways as a sum of consecutive naturals, for example, 19401 + ... + 27753.

It is an arithmetic number, because the mean of its divisors is an integer number (17042160).

Almost surely, 2^196938681 is an apocalyptic number.

It is an amenable number.

196938681 is a deficient number, since it is larger than the sum of its proper divisors (75735879).

196938681 is a wasteful number, since it uses less digits than its factorization.

196938681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8656.

The product of its digits is 559872, while the sum is 51.

The square root of 196938681 is about 14033.4842786815. The cubic root of 196938681 is about 581.8044093057.

The spelling of 196938681 in words is "one hundred ninety-six million, nine hundred thirty-eight thousand, six hundred eighty-one".