381449239 has 2 divisors, whose sum is σ = 381449240. Its totient is φ = 381449238.

The previous prime is 381449231. The next prime is 381449251. The reversal of 381449239 is 932944183.

It is a weak prime.

It is an emirp because it is prime and its reverse (932944183) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 381449239 - 2³ = 381449231 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 381449195 and 381449204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (381449231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190724619 + 190724620.

It is an arithmetic number, because the mean of its divisors is an integer number (190724620).

Almost surely, 2^381449239 is an apocalyptic number.

381449239 is a deficient number, since it is larger than the sum of its proper divisors (1).

381449239 is an equidigital number, since it uses as much as digits as its factorization.

381449239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 186624, while the sum is 43.

The square root of 381449239 is about 19530.7255113577. The cubic root of 381449239 is about 725.2352714039.

The spelling of 381449239 in words is "three hundred eighty-one million, four hundred forty-nine thousand, two hundred thirty-nine".