381009829 has 2 divisors, whose sum is σ = 381009830. Its totient is φ = 381009828.

The previous prime is 381009823. The next prime is 381009847. The reversal of 381009829 is 928900183.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 368064225 + 12945604 = 19185^2 + 3598^2 .

It is a cyclic number.

It is not a de Polignac number, because 381009829 - 2²⁷ = 246792101 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 381009791 and 381009800.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (381009823) 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, 190504914 + 190504915.

It is an arithmetic number, because the mean of its divisors is an integer number (190504915).

Almost surely, 2^381009829 is an apocalyptic number.

It is an amenable number.

381009829 is a deficient number, since it is larger than the sum of its proper divisors (1).

381009829 is an equidigital number, since it uses as much as digits as its factorization.

381009829 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 381009829 is about 19519.4730717814. The cubic root of 381009829 is about 724.9566864334.

The spelling of 381009829 in words is "three hundred eighty-one million, nine thousand, eight hundred twenty-nine".