381633193 has 2 divisors, whose sum is σ = 381633194. Its totient is φ = 381633192.

The previous prime is 381633179. The next prime is 381633229. The reversal of 381633193 is 391336183.

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., 306845289 + 74787904 = 17517^2 + 8648^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-381633193 is a prime.

It is not a weakly prime, because it can be changed into another prime (381633113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190816596 + 190816597.

It is an arithmetic number, because the mean of its divisors is an integer number (190816597).

Almost surely, 2^381633193 is an apocalyptic number.

It is an amenable number.

381633193 is a deficient number, since it is larger than the sum of its proper divisors (1).

381633193 is an equidigital number, since it uses as much as digits as its factorization.

381633193 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34992, while the sum is 37.

The square root of 381633193 is about 19535.4342925874. The cubic root of 381633193 is about 725.3518343045.

The spelling of 381633193 in words is "three hundred eighty-one million, six hundred thirty-three thousand, one hundred ninety-three".