196931381 has 2 divisors, whose sum is σ = 196931382. Its totient is φ = 196931380.

The previous prime is 196931369. The next prime is 196931393. The reversal of 196931381 is 183139691.

It is a balanced prime because it is at equal distance from previous prime (196931369) and next prime (196931393).

It can be written as a sum of positive squares in only one way, i.e., 144600625 + 52330756 = 12025^2 + 7234^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-196931381 is a prime.

It is a super-2 number, since 2×196931381² = 77563937645134322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (196931311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98465690 + 98465691.

It is an arithmetic number, because the mean of its divisors is an integer number (98465691).

Almost surely, 2^196931381 is an apocalyptic number.

It is an amenable number.

196931381 is a deficient number, since it is larger than the sum of its proper divisors (1).

196931381 is an equidigital number, since it uses as much as digits as its factorization.

196931381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34992, while the sum is 41.

The square root of 196931381 is about 14033.2241840569. The cubic root of 196931381 is about 581.7972205628.

The spelling of 196931381 in words is "one hundred ninety-six million, nine hundred thirty-one thousand, three hundred eighty-one".