196040381 has 2 divisors, whose sum is σ = 196040382. Its totient is φ = 196040380.

The previous prime is 196040357. The next prime is 196040407. The reversal of 196040381 is 183040691.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 181333156 + 14707225 = 13466^2 + 3835^2 .

It is an emirp because it is prime and its reverse (183040691) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-196040381 is a prime.

It is a super-2 number, since 2×196040381² = 76863661965250322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (196040281) 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, 98020190 + 98020191.

It is an arithmetic number, because the mean of its divisors is an integer number (98020191).

Almost surely, 2^196040381 is an apocalyptic number.

It is an amenable number.

196040381 is a deficient number, since it is larger than the sum of its proper divisors (1).

196040381 is an equidigital number, since it uses as much as digits as its factorization.

196040381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 196040381 is about 14001.4421042977. The cubic root of 196040381 is about 580.9184625519.

The spelling of 196040381 in words is "one hundred ninety-six million, forty thousand, three hundred eighty-one".