394252973 has 2 divisors, whose sum is σ = 394252974. Its totient is φ = 394252972.

The previous prime is 394252879. The next prime is 394253003. The reversal of 394252973 is 379252493.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 337897924 + 56355049 = 18382^2 + 7507^2 .

It is a cyclic number.

It is not a de Polignac number, because 394252973 - 2¹⁸ = 393990829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (394222973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197126486 + 197126487.

It is an arithmetic number, because the mean of its divisors is an integer number (197126487).

Almost surely, 2^394252973 is an apocalyptic number.

It is an amenable number.

394252973 is a deficient number, since it is larger than the sum of its proper divisors (1).

394252973 is an equidigital number, since it uses as much as digits as its factorization.

394252973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 408240, while the sum is 44.

The square root of 394252973 is about 19855.8045165639. The cubic root of 394252973 is about 733.2605591465.

The spelling of 394252973 in words is "three hundred ninety-four million, two hundred fifty-two thousand, nine hundred seventy-three".