394222973 has 2 divisors, whose sum is σ = 394222974. Its totient is φ = 394222972.

The previous prime is 394222943. The next prime is 394222991. The reversal of 394222973 is 379222493.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 262018969 + 132204004 = 16187^2 + 11498^2 .

It is a cyclic number.

It is not a de Polignac number, because 394222973 - 2⁶ = 394222909 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 394222973.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (394222903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197111486 + 197111487.

It is an arithmetic number, because the mean of its divisors is an integer number (197111487).

Almost surely, 2^394222973 is an apocalyptic number.

It is an amenable number.

394222973 is a deficient number, since it is larger than the sum of its proper divisors (1).

394222973 is an equidigital number, since it uses as much as digits as its factorization.

394222973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 163296, while the sum is 41.

The square root of 394222973 is about 19855.0490555929. The cubic root of 394222973 is about 733.2419599422.

The spelling of 394222973 in words is "three hundred ninety-four million, two hundred twenty-two thousand, nine hundred seventy-three".