394166993 has 8 divisors (see below), whose sum is σ = 431360640. Its totient is φ = 357200080.

The previous prime is 394166987. The next prime is 394167001. The reversal of 394166993 is 399661493.

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

It is a cyclic number.

It is not a de Polignac number, because 394166993 - 2²⁴ = 377389777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (394166093) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53033 + ... + 60006.

It is an arithmetic number, because the mean of its divisors is an integer number (53920080).

Almost surely, 2^394166993 is an apocalyptic number.

It is an amenable number.

394166993 is a deficient number, since it is larger than the sum of its proper divisors (37193647).

394166993 is a wasteful number, since it uses less digits than its factorization.

394166993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113367.

The product of its digits is 944784, while the sum is 50.

The square root of 394166993 is about 19853.6392885536. The cubic root of 394166993 is about 733.2072513038.

The spelling of 394166993 in words is "three hundred ninety-four million, one hundred sixty-six thousand, nine hundred ninety-three".