394817289929 has 8 divisors (see below), whose sum is σ = 401685907272. Its totient is φ = 387961453440.

The previous prime is 394817289899. The next prime is 394817289947. The reversal of 394817289929 is 929982718493.

It can be written as a sum of positive squares in 4 ways, for example, as 118093947904 + 276723342025 = 343648^2 + 526045^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-394817289929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (394817289029) 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, 3132884 + ... + 3256469.

It is an arithmetic number, because the mean of its divisors is an integer number (50210738409).

Almost surely, 2^394817289929 is an apocalyptic number.

It is an amenable number.

394817289929 is a deficient number, since it is larger than the sum of its proper divisors (6868617343).

394817289929 is a wasteful number, since it uses less digits than its factorization.

394817289929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6390427.

The product of its digits is 141087744, while the sum is 71.

The spelling of 394817289929 in words is "three hundred ninety-four billion, eight hundred seventeen million, two hundred eighty-nine thousand, nine hundred twenty-nine".