381419893 has 2 divisors, whose sum is σ = 381419894. Its totient is φ = 381419892.

The previous prime is 381419887. The next prime is 381419911. The reversal of 381419893 is 398914183.

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., 193126609 + 188293284 = 13897^2 + 13722^2 .

It is a cyclic number.

It is not a de Polignac number, because 381419893 - 2²⁵ = 347865461 is a prime.

It is a super-2 number, since 2×381419893² = 290962269552262898, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (381419873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190709946 + 190709947.

It is an arithmetic number, because the mean of its divisors is an integer number (190709947).

Almost surely, 2^381419893 is an apocalyptic number.

It is an amenable number.

381419893 is a deficient number, since it is larger than the sum of its proper divisors (1).

381419893 is an equidigital number, since it uses as much as digits as its factorization.

381419893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 186624, while the sum is 46.

The square root of 381419893 is about 19529.9742191330. The cubic root of 381419893 is about 725.2166727736.

The spelling of 381419893 in words is "three hundred eighty-one million, four hundred nineteen thousand, eight hundred ninety-three".