394332143 has 2 divisors, whose sum is σ = 394332144. Its totient is φ = 394332142.

The previous prime is 394332089. The next prime is 394332149. The reversal of 394332143 is 341233493.

It is a strong prime.

It is an emirp because it is prime and its reverse (341233493) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-394332143 is a prime.

It is a super-3 number, since 3×394332143³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (394332149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197166071 + 197166072.

It is an arithmetic number, because the mean of its divisors is an integer number (197166072).

Almost surely, 2^394332143 is an apocalyptic number.

394332143 is a deficient number, since it is larger than the sum of its proper divisors (1).

394332143 is an equidigital number, since it uses as much as digits as its factorization.

394332143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 32.

The square root of 394332143 is about 19857.7980400648. The cubic root of 394332143 is about 733.3096379166.

The spelling of 394332143 in words is "three hundred ninety-four million, three hundred thirty-two thousand, one hundred forty-three".