945666394 has 16 divisors (see below), whose sum is σ = 1503207720. Its totient is φ = 445392640.

The previous prime is 945666383. The next prime is 945666401. The reversal of 945666394 is 493666549.

It can be written as a sum of positive squares in 4 ways, for example, as 722910769 + 222755625 = 26887^2 + 14925^2 .

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 196459 + ... + 201214.

Almost surely, 2^945666394 is an apocalyptic number.

945666394 is a deficient number, since it is larger than the sum of its proper divisors (557541326).

945666394 is a wasteful number, since it uses less digits than its factorization.

945666394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397745.

The product of its digits is 4199040, while the sum is 52.

The square root of 945666394 is about 30751.6892869319. The cubic root of 945666394 is about 981.5505075302.

The spelling of 945666394 in words is "nine hundred forty-five million, six hundred sixty-six thousand, three hundred ninety-four".