381000667 has 2 divisors, whose sum is σ = 381000668. Its totient is φ = 381000666.

The previous prime is 381000661. The next prime is 381000677. The reversal of 381000667 is 766000183.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-381000667 is a prime.

It is not a weakly prime, because it can be changed into another prime (381000661) 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, 190500333 + 190500334.

It is an arithmetic number, because the mean of its divisors is an integer number (190500334).

Almost surely, 2^381000667 is an apocalyptic number.

381000667 is a deficient number, since it is larger than the sum of its proper divisors (1).

381000667 is an equidigital number, since it uses as much as digits as its factorization.

381000667 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 381000667 is about 19519.2383816582. The cubic root of 381000667 is about 724.9508754666.

The spelling of 381000667 in words is "three hundred eighty-one million, six hundred sixty-seven", and thus it is an aban number.