1909381682 has 8 divisors (see below), whose sum is σ = 3084385836. Its totient is φ = 881253072.

The previous prime is 1909381681. The next prime is 1909381709. The reversal of 1909381682 is 2861839091.

It can be written as a sum of positive squares in 2 ways, for example, as 1868919361 + 40462321 = 43231^2 + 6361^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1909381681) 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 in 3 ways as a sum of consecutive naturals, for example, 36718853 + ... + 36718904.

Almost surely, 2^1909381682 is an apocalyptic number.

1909381682 is a deficient number, since it is larger than the sum of its proper divisors (1175004154).

1909381682 is a wasteful number, since it uses less digits than its factorization.

1909381682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73437772.

The product of its (nonzero) digits is 186624, while the sum is 47.

The square root of 1909381682 is about 43696.4721916999. The cubic root of 1909381682 is about 1240.5975445554.

The spelling of 1909381682 in words is "one billion, nine hundred nine million, three hundred eighty-one thousand, six hundred eighty-two".