394422917 has 8 divisors (see below), whose sum is σ = 450991296. Its totient is φ = 337910112.

The previous prime is 394422913. The next prime is 394422943. The reversal of 394422917 is 719224493.

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 394422917 - 2² = 394422913 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394422913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2633 + ... + 28209.

It is an arithmetic number, because the mean of its divisors is an integer number (56373912).

Almost surely, 2^394422917 is an apocalyptic number.

It is an amenable number.

394422917 is a deficient number, since it is larger than the sum of its proper divisors (56568379).

394422917 is a wasteful number, since it uses less digits than its factorization.

394422917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27787.

The product of its digits is 108864, while the sum is 41.

The square root of 394422917 is about 19860.0835093914. The cubic root of 394422917 is about 733.3659021118.

The spelling of 394422917 in words is "three hundred ninety-four million, four hundred twenty-two thousand, nine hundred seventeen".