394722969 has 8 divisors (see below), whose sum is σ = 543274752. Its totient is φ = 254659920.

The previous prime is 394722961. The next prime is 394722971. The reversal of 394722969 is 969227493.

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

It is not a de Polignac number, because 394722969 - 2³ = 394722961 is a prime.

It is a super-2 number, since 2×394722969² = 311612444512349922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (394722961) 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, 2122074 + ... + 2122259.

It is an arithmetic number, because the mean of its divisors is an integer number (67909344).

Almost surely, 2^394722969 is an apocalyptic number.

It is an amenable number.

394722969 is a deficient number, since it is larger than the sum of its proper divisors (148551783).

394722969 is a wasteful number, since it uses less digits than its factorization.

394722969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4244367.

The product of its digits is 1469664, while the sum is 51.

The square root of 394722969 is about 19867.6362207486. The cubic root of 394722969 is about 733.5518211007.

The spelling of 394722969 in words is "three hundred ninety-four million, seven hundred twenty-two thousand, nine hundred sixty-nine".