381444667 has 2 divisors, whose sum is σ = 381444668. Its totient is φ = 381444666.

The previous prime is 381444659. The next prime is 381444683. The reversal of 381444667 is 766444183.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 381444667 - 2³ = 381444659 is a prime.

It is equal to p_20398678 and since 381444667 and 20398678 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (381444697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190722333 + 190722334.

It is an arithmetic number, because the mean of its divisors is an integer number (190722334).

Almost surely, 2^381444667 is an apocalyptic number.

381444667 is a deficient number, since it is larger than the sum of its proper divisors (1).

381444667 is an equidigital number, since it uses as much as digits as its factorization.

381444667 is an evil number, because the sum of its binary digits is even.

The product of its digits is 387072, while the sum is 43.

The square root of 381444667 is about 19530.6084646639. The cubic root of 381444667 is about 725.2323738677.

The spelling of 381444667 in words is "three hundred eighty-one million, four hundred forty-four thousand, six hundred sixty-seven".