394343501 has 2 divisors, whose sum is σ = 394343502. Its totient is φ = 394343500.

The previous prime is 394343483. The next prime is 394343507. The reversal of 394343501 is 105343493.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 382163401 + 12180100 = 19549^2 + 3490^2 .

It is a cyclic number.

It is not a de Polignac number, because 394343501 - 2⁶ = 394343437 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 (394343507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197171750 + 197171751.

It is an arithmetic number, because the mean of its divisors is an integer number (197171751).

Almost surely, 2^394343501 is an apocalyptic number.

It is an amenable number.

394343501 is a deficient number, since it is larger than the sum of its proper divisors (1).

394343501 is an equidigital number, since it uses as much as digits as its factorization.

394343501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 32.

The square root of 394343501 is about 19858.0840213753. The cubic root of 394343501 is about 733.3166783867.

Adding to 394343501 its reverse (105343493), we get a palindrome (499686994).

The spelling of 394343501 in words is "three hundred ninety-four million, three hundred forty-three thousand, five hundred one".