381626159 has 2 divisors, whose sum is σ = 381626160. Its totient is φ = 381626158.

The previous prime is 381626131. The next prime is 381626209. The reversal of 381626159 is 951626183.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 381626159 - 2¹² = 381622063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (381626759) 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, 190813079 + 190813080.

It is an arithmetic number, because the mean of its divisors is an integer number (190813080).

Almost surely, 2^381626159 is an apocalyptic number.

381626159 is a deficient number, since it is larger than the sum of its proper divisors (1).

381626159 is an equidigital number, since it uses as much as digits as its factorization.

381626159 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 41.

The square root of 381626159 is about 19535.2542599271. The cubic root of 381626159 is about 725.3473778821.

The spelling of 381626159 in words is "three hundred eighty-one million, six hundred twenty-six thousand, one hundred fifty-nine".