394264399 has 2 divisors, whose sum is σ = 394264400. Its totient is φ = 394264398.

The previous prime is 394264379. The next prime is 394264433. The reversal of 394264399 is 993462493.

It is a weak prime.

It is an emirp because it is prime and its reverse (993462493) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-394264399 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (394264319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197132199 + 197132200.

It is an arithmetic number, because the mean of its divisors is an integer number (197132200).

Almost surely, 2^394264399 is an apocalyptic number.

394264399 is a deficient number, since it is larger than the sum of its proper divisors (1).

394264399 is an equidigital number, since it uses as much as digits as its factorization.

394264399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1259712, while the sum is 49.

The square root of 394264399 is about 19856.0922389074. The cubic root of 394264399 is about 733.2676427154.

The spelling of 394264399 in words is "three hundred ninety-four million, two hundred sixty-four thousand, three hundred ninety-nine".