381006859 has 2 divisors, whose sum is σ = 381006860. Its totient is φ = 381006858.

The previous prime is 381006853. The next prime is 381006883. The reversal of 381006859 is 958600183.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-381006859 is a prime.

It is a super-3 number, since 3×381006859³ (a number of 27 digits) contains 333 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (381006853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190503429 + 190503430.

It is an arithmetic number, because the mean of its divisors is an integer number (190503430).

Almost surely, 2^381006859 is an apocalyptic number.

381006859 is a deficient number, since it is larger than the sum of its proper divisors (1).

381006859 is an equidigital number, since it uses as much as digits as its factorization.

381006859 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 381006859 is about 19519.3969937598. The cubic root of 381006859 is about 724.9548027314.

The spelling of 381006859 in words is "three hundred eighty-one million, six thousand, eight hundred fifty-nine".