381492847 has 2 divisors, whose sum is σ = 381492848. Its totient is φ = 381492846.

The previous prime is 381492833. The next prime is 381492877. The reversal of 381492847 is 748294183.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 381492847 - 2¹¹ = 381490799 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 381492797 and 381492806.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (381492827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190746423 + 190746424.

It is an arithmetic number, because the mean of its divisors is an integer number (190746424).

Almost surely, 2^381492847 is an apocalyptic number.

381492847 is a deficient number, since it is larger than the sum of its proper divisors (1).

381492847 is an equidigital number, since it uses as much as digits as its factorization.

381492847 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 387072, while the sum is 46.

The square root of 381492847 is about 19531.8418742319. The cubic root of 381492847 is about 725.2629071077.

The spelling of 381492847 in words is "three hundred eighty-one million, four hundred ninety-two thousand, eight hundred forty-seven".