381024139 has 2 divisors, whose sum is σ = 381024140. Its totient is φ = 381024138.

The previous prime is 381024121. The next prime is 381024191. The reversal of 381024139 is 931420183.

It is a weak prime.

It is an emirp because it is prime and its reverse (931420183) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 381024139 - 2¹⁵ = 380991371 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 381024139.

It is not a weakly prime, because it can be changed into another prime (381027139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190512069 + 190512070.

It is an arithmetic number, because the mean of its divisors is an integer number (190512070).

Almost surely, 2^381024139 is an apocalyptic number.

381024139 is a deficient number, since it is larger than the sum of its proper divisors (1).

381024139 is an equidigital number, since it uses as much as digits as its factorization.

381024139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 381024139 is about 19519.8396253658. The cubic root of 381024139 is about 724.9657623150.

The spelling of 381024139 in words is "three hundred eighty-one million, twenty-four thousand, one hundred thirty-nine".