394140165 has 16 divisors (see below), whose sum is σ = 631133376. Its totient is φ = 210038400.

The previous prime is 394140143. The next prime is 394140209. The reversal of 394140165 is 561041493.

It is not a de Polignac number, because 394140165 - 2⁵ = 394140133 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9870 + ... + 29760.

It is an arithmetic number, because the mean of its divisors is an integer number (39445836).

Almost surely, 2^394140165 is an apocalyptic number.

It is an amenable number.

394140165 is a deficient number, since it is larger than the sum of its proper divisors (236993211).

394140165 is a wasteful number, since it uses less digits than its factorization.

394140165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21220.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 394140165 is about 19852.9636326670. The cubic root of 394140165 is about 733.1906162812.

The spelling of 394140165 in words is "three hundred ninety-four million, one hundred forty thousand, one hundred sixty-five".