1909094138 has 8 divisors (see below), whose sum is σ = 3272732832. Its totient is φ = 818183196.

The previous prime is 1909094137. The next prime is 1909094147. The reversal of 1909094138 is 8314909091.

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 (1909094137) 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 in 3 ways as a sum of consecutive naturals, for example, 68181920 + ... + 68181947.

It is an arithmetic number, because the mean of its divisors is an integer number (409091604).

Almost surely, 2^1909094138 is an apocalyptic number.

1909094138 is a deficient number, since it is larger than the sum of its proper divisors (1363638694).

1909094138 is a wasteful number, since it uses less digits than its factorization.

1909094138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136363876.

The product of its (nonzero) digits is 69984, while the sum is 44.

The square root of 1909094138 is about 43693.1818250857. The cubic root of 1909094138 is about 1240.5352653558.

The spelling of 1909094138 in words is "one billion, nine hundred nine million, ninety-four thousand, one hundred thirty-eight".