394313689 has 8 divisors (see below), whose sum is σ = 491611968. Its totient is φ = 307257360.

The previous prime is 394313683. The next prime is 394313701. The reversal of 394313689 is 986313493.

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 394313689 - 2³ = 394313681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (394313681) by changing a digit.

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, 2560402 + ... + 2560555.

It is an arithmetic number, because the mean of its divisors is an integer number (61451496).

Almost surely, 2^394313689 is an apocalyptic number.

It is an amenable number.

394313689 is a deficient number, since it is larger than the sum of its proper divisors (97298279).

394313689 is a wasteful number, since it uses less digits than its factorization.

394313689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5120975.

The product of its digits is 419904, while the sum is 46.

The square root of 394313689 is about 19857.3333808948. Note that the first 4 decimals coincide. The cubic root of 394313689 is about 733.2981985692.

The spelling of 394313689 in words is "three hundred ninety-four million, three hundred thirteen thousand, six hundred eighty-nine".