394966651 has 4 divisors (see below), whose sum is σ = 395812872. Its totient is φ = 394120432.

The previous prime is 394966613. The next prime is 394966657. The reversal of 394966651 is 156669493.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-394966651 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 394966595 and 394966604.

It is not an unprimeable number, because it can be changed into a prime (394966657) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 422410 + ... + 423343.

It is an arithmetic number, because the mean of its divisors is an integer number (98953218).

Almost surely, 2^394966651 is an apocalyptic number.

394966651 is a deficient number, since it is larger than the sum of its proper divisors (846221).

394966651 is an equidigital number, since it uses as much as digits as its factorization.

394966651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 846220.

The product of its digits is 1049760, while the sum is 49.

The square root of 394966651 is about 19873.7679114958. The cubic root of 394966651 is about 733.7027426474.

The spelling of 394966651 in words is "three hundred ninety-four million, nine hundred sixty-six thousand, six hundred fifty-one".