381247867 has 16 divisors (see below), whose sum is σ = 511886592. Its totient is φ = 274223520.

The previous prime is 381247861. The next prime is 381247873. The reversal of 381247867 is 768742183.

It is an interprime number because it is at equal distance from previous prime (381247861) and next prime (381247873).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-381247867 is a prime.

It is not an unprimeable number, because it can be changed into a prime (381247861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 189433 + ... + 191434.

It is an arithmetic number, because the mean of its divisors is an integer number (31992912).

Almost surely, 2^381247867 is an apocalyptic number.

381247867 is a deficient number, since it is larger than the sum of its proper divisors (130638725).

381247867 is a wasteful number, since it uses less digits than its factorization.

381247867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380898.

The product of its digits is 451584, while the sum is 46.

The square root of 381247867 is about 19525.5695691573. The cubic root of 381247867 is about 725.1076285715.

The spelling of 381247867 in words is "three hundred eighty-one million, two hundred forty-seven thousand, eight hundred sixty-seven".