1941378905 has 16 divisors (see below), whose sum is σ = 2397233664. Its totient is φ = 1508392320.

The previous prime is 1941378889. The next prime is 1941378931. The reversal of 1941378905 is 5098731491.

It is not a de Polignac number, because 1941378905 - 2⁴ = 1941378889 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1941378905.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 24482 + ... + 66948.

It is an arithmetic number, because the mean of its divisors is an integer number (149827104).

Almost surely, 2^1941378905 is an apocalyptic number.

It is an amenable number.

1941378905 is a deficient number, since it is larger than the sum of its proper divisors (455854759).

1941378905 is a wasteful number, since it uses less digits than its factorization.

1941378905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42736.

The product of its (nonzero) digits is 272160, while the sum is 47.

The square root of 1941378905 is about 44061.0815232672. The cubic root of 1941378905 is about 1247.4891261872.

The spelling of 1941378905 in words is "one billion, nine hundred forty-one million, three hundred seventy-eight thousand, nine hundred five".