381080191 has 2 divisors, whose sum is σ = 381080192. Its totient is φ = 381080190.

The previous prime is 381080173. The next prime is 381080197. The reversal of 381080191 is 191080183.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 381080191 - 2²¹ = 378983039 is a prime.

It is a super-2 number, since 2×381080191² = 290444223945192962, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (381080197) 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, 190540095 + 190540096.

It is an arithmetic number, because the mean of its divisors is an integer number (190540096).

Almost surely, 2^381080191 is an apocalyptic number.

381080191 is a deficient number, since it is larger than the sum of its proper divisors (1).

381080191 is an equidigital number, since it uses as much as digits as its factorization.

381080191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 31.

The square root of 381080191 is about 19521.2753425589. The cubic root of 381080191 is about 725.0013101839.

The spelling of 381080191 in words is "three hundred eighty-one million, eighty thousand, one hundred ninety-one".