381365443 has 2 divisors, whose sum is σ = 381365444. Its totient is φ = 381365442.

The previous prime is 381365429. The next prime is 381365459. The reversal of 381365443 is 344563183.

It is a weak prime.

It is an emirp because it is prime and its reverse (344563183) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 381365443 - 2²⁵ = 347811011 is a prime.

It is a super-2 number, since 2×381365443² = 290879202229172498, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (381365143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190682721 + 190682722.

It is an arithmetic number, because the mean of its divisors is an integer number (190682722).

Almost surely, 2^381365443 is an apocalyptic number.

381365443 is a deficient number, since it is larger than the sum of its proper divisors (1).

381365443 is an equidigital number, since it uses as much as digits as its factorization.

381365443 is an evil number, because the sum of its binary digits is even.

The product of its digits is 103680, while the sum is 37.

The square root of 381365443 is about 19528.5801583218. The cubic root of 381365443 is about 725.1821614404.

The spelling of 381365443 in words is "three hundred eighty-one million, three hundred sixty-five thousand, four hundred forty-three".