381856799 has 2 divisors, whose sum is σ = 381856800. Its totient is φ = 381856798.

The previous prime is 381856789. The next prime is 381856829. The reversal of 381856799 is 997658183.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 381856799 - 2¹² = 381852703 is a prime.

It is a super-2 number, since 2×381856799² = 291629229885052802, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (381856789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190928399 + 190928400.

It is an arithmetic number, because the mean of its divisors is an integer number (190928400).

Almost surely, 2^381856799 is an apocalyptic number.

381856799 is a deficient number, since it is larger than the sum of its proper divisors (1).

381856799 is an equidigital number, since it uses as much as digits as its factorization.

381856799 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3265920, while the sum is 56.

The square root of 381856799 is about 19541.1565420269. The cubic root of 381856799 is about 725.4934723645.

The spelling of 381856799 in words is "three hundred eighty-one million, eight hundred fifty-six thousand, seven hundred ninety-nine".