381121087 has 2 divisors, whose sum is σ = 381121088. Its totient is φ = 381121086.

The previous prime is 381121067. The next prime is 381121141. The reversal of 381121087 is 780121183.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 381121087 - 2⁷ = 381120959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (381121067) 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, 190560543 + 190560544.

It is an arithmetic number, because the mean of its divisors is an integer number (190560544).

Almost surely, 2^381121087 is an apocalyptic number.

381121087 is a deficient number, since it is larger than the sum of its proper divisors (1).

381121087 is an equidigital number, since it uses as much as digits as its factorization.

381121087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 31.

The square root of 381121087 is about 19522.3227870046. The cubic root of 381121087 is about 725.0272440020.

The spelling of 381121087 in words is "three hundred eighty-one million, one hundred twenty-one thousand, eighty-seven".