394703480921 has 8 divisors (see below), whose sum is σ = 396735909600. Its totient is φ = 392672579040.

The previous prime is 394703480879. The next prime is 394703480987. The reversal of 394703480921 is 129084307493.

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 394703480921 - 2³⁸ = 119825573977 is a prime.

It is a super-2 number, since 2×394703480921² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 394703480921.

It is not an unprimeable number, because it can be changed into a prime (394703480321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138485 + ... + 899213.

It is an arithmetic number, because the mean of its divisors is an integer number (49591988700).

Almost surely, 2^394703480921 is an apocalyptic number.

It is an amenable number.

394703480921 is a deficient number, since it is larger than the sum of its proper divisors (2032428679).

394703480921 is a wasteful number, since it uses less digits than its factorization.

394703480921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 763399.

The product of its (nonzero) digits is 1306368, while the sum is 50.

The spelling of 394703480921 in words is "three hundred ninety-four billion, seven hundred three million, four hundred eighty thousand, nine hundred twenty-one".