381887447039 has 4 divisors (see below), whose sum is σ = 436442796624. Its totient is φ = 327332097456.

The previous prime is 381887447021. The next prime is 381887447047. The reversal of 381887447039 is 930744788183.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 930744788183 = 7 ⋅132963541169.

It is not a de Polignac number, because 381887447039 - 2³² = 377592479743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381887447059) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27277674782 + ... + 27277674795.

It is an arithmetic number, because the mean of its divisors is an integer number (109110699156).

Almost surely, 2^381887447039 is an apocalyptic number.

381887447039 is a deficient number, since it is larger than the sum of its proper divisors (54555349585).

381887447039 is an equidigital number, since it uses as much as digits as its factorization.

381887447039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54555349584.

The product of its (nonzero) digits is 32514048, while the sum is 62.

The spelling of 381887447039 in words is "three hundred eighty-one billion, eight hundred eighty-seven million, four hundred forty-seven thousand, thirty-nine".