381066839 has 8 divisors (see below), whose sum is σ = 385662000. Its totient is φ = 376488000.

The previous prime is 381066827. The next prime is 381066853. The reversal of 381066839 is 938660183.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 381066839 - 2⁴ = 381066823 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 381066839.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381066739) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46619 + ... + 54179.

It is an arithmetic number, because the mean of its divisors is an integer number (48207750).

Almost surely, 2^381066839 is an apocalyptic number.

381066839 is a deficient number, since it is larger than the sum of its proper divisors (4595161).

381066839 is a wasteful number, since it uses less digits than its factorization.

381066839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8161.

The product of its (nonzero) digits is 186624, while the sum is 44.

The square root of 381066839 is about 19520.9333537103. The cubic root of 381066839 is about 724.9928427355.

The spelling of 381066839 in words is "three hundred eighty-one million, sixty-six thousand, eight hundred thirty-nine".