381061819 has 2 divisors, whose sum is σ = 381061820. Its totient is φ = 381061818.

The previous prime is 381061781. The next prime is 381061841. The reversal of 381061819 is 918160183.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 381061819 - 2⁷ = 381061691 is a prime.

It is a super-2 number, since 2×381061819² = 290416219799177522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (381061859) 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 as a sum of consecutive naturals, namely, 190530909 + 190530910.

It is an arithmetic number, because the mean of its divisors is an integer number (190530910).

Almost surely, 2^381061819 is an apocalyptic number.

381061819 is a deficient number, since it is larger than the sum of its proper divisors (1).

381061819 is an equidigital number, since it uses as much as digits as its factorization.

381061819 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 37.

The square root of 381061819 is about 19520.8047733694. The cubic root of 381061819 is about 724.9896591470.

The spelling of 381061819 in words is "three hundred eighty-one million, sixty-one thousand, eight hundred nineteen".