381167999 has 12 divisors (see below), whose sum is σ = 407964384. Its totient is φ = 354898944.

The previous prime is 381167989. The next prime is 381168001. The reversal of 381167999 is 999761183.

It is a de Polignac number, because none of the positive numbers 2^k-381167999 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 381167999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381167929) 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 11 ways as a sum of consecutive naturals, for example, 158762 + ... + 161144.

It is an arithmetic number, because the mean of its divisors is an integer number (33997032).

Almost surely, 2^381167999 is an apocalyptic number.

381167999 is a deficient number, since it is larger than the sum of its proper divisors (26796385).

381167999 is an equidigital number, since it uses as much as digits as its factorization.

381167999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2594 (or 2497 counting only the distinct ones).

The product of its digits is 734832, while the sum is 53.

The square root of 381167999 is about 19523.5242464059. The cubic root of 381167999 is about 725.0569905259.

The spelling of 381167999 in words is "three hundred eighty-one million, one hundred sixty-seven thousand, nine hundred ninety-nine".