381361139 has 2 divisors, whose sum is σ = 381361140. Its totient is φ = 381361138.

The previous prime is 381361133. The next prime is 381361159. The reversal of 381361139 is 931163183.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 381361139 - 2⁸ = 381360883 is a prime.

It is equal to p_20394458 and since 381361139 and 20394458 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 381361099 and 381361108.

It is not a weakly prime, because it can be changed into another prime (381361133) 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, 190680569 + 190680570.

It is an arithmetic number, because the mean of its divisors is an integer number (190680570).

Almost surely, 2^381361139 is an apocalyptic number.

381361139 is a deficient number, since it is larger than the sum of its proper divisors (1).

381361139 is an equidigital number, since it uses as much as digits as its factorization.

381361139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11664, while the sum is 35.

The square root of 381361139 is about 19528.4699605473. The cubic root of 381361139 is about 725.1794333522.

The spelling of 381361139 in words is "three hundred eighty-one million, three hundred sixty-one thousand, one hundred thirty-nine".