393922423 has 2 divisors, whose sum is σ = 393922424. Its totient is φ = 393922422.

The previous prime is 393922393. The next prime is 393922433. The reversal of 393922423 is 324229393.

It is a strong prime.

It is an emirp because it is prime and its reverse (324229393) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 393922423 - 2⁹ = 393921911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (393922433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 196961211 + 196961212.

It is an arithmetic number, because the mean of its divisors is an integer number (196961212).

Almost surely, 2^393922423 is an apocalyptic number.

393922423 is a deficient number, since it is larger than the sum of its proper divisors (1).

393922423 is an equidigital number, since it uses as much as digits as its factorization.

393922423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69984, while the sum is 37.

The square root of 393922423 is about 19847.4790086802. The cubic root of 393922423 is about 733.0555748136.

It can be divided in two parts, 3939 and 22423, that added together give a palindrome (26362).

The spelling of 393922423 in words is "three hundred ninety-three million, nine hundred twenty-two thousand, four hundred twenty-three".