381343189 has 2 divisors, whose sum is σ = 381343190. Its totient is φ = 381343188.

The previous prime is 381343169. The next prime is 381343223. The reversal of 381343189 is 981343183.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 320768100 + 60575089 = 17910^2 + 7783^2 .

It is a cyclic number.

It is not a de Polignac number, because 381343189 - 2⁹ = 381342677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (381343139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190671594 + 190671595.

It is an arithmetic number, because the mean of its divisors is an integer number (190671595).

Almost surely, 2^381343189 is an apocalyptic number.

It is an amenable number.

381343189 is a deficient number, since it is larger than the sum of its proper divisors (1).

381343189 is an equidigital number, since it uses as much as digits as its factorization.

381343189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 40.

The square root of 381343189 is about 19528.0103697228. The cubic root of 381343189 is about 725.1680555323.

The spelling of 381343189 in words is "three hundred eighty-one million, three hundred forty-three thousand, one hundred eighty-nine".