381278203 has 2 divisors, whose sum is σ = 381278204. Its totient is φ = 381278202.

The previous prime is 381278189. The next prime is 381278231. The reversal of 381278203 is 302872183.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 381278203 - 2¹⁷ = 381147131 is a prime.

It is not a weakly prime, because it can be changed into another prime (381278273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190639101 + 190639102.

It is an arithmetic number, because the mean of its divisors is an integer number (190639102).

Almost surely, 2^381278203 is an apocalyptic number.

381278203 is a deficient number, since it is larger than the sum of its proper divisors (1).

381278203 is an equidigital number, since it uses as much as digits as its factorization.

381278203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 381278203 is about 19526.3463812358. The cubic root of 381278203 is about 725.1268604008.

The spelling of 381278203 in words is "three hundred eighty-one million, two hundred seventy-eight thousand, two hundred three".