394955549 has 2 divisors, whose sum is σ = 394955550. Its totient is φ = 394955548.

The previous prime is 394955537. The next prime is 394955581. The reversal of 394955549 is 945559493.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 375972100 + 18983449 = 19390^2 + 4357^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-394955549 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 394955549.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (394955599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197477774 + 197477775.

It is an arithmetic number, because the mean of its divisors is an integer number (197477775).

Almost surely, 2^394955549 is an apocalyptic number.

It is an amenable number.

394955549 is a deficient number, since it is larger than the sum of its proper divisors (1).

394955549 is an equidigital number, since it uses as much as digits as its factorization.

394955549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4374000, while the sum is 53.

The square root of 394955549 is about 19873.4885966204. The cubic root of 394955549 is about 733.6958681057.

The spelling of 394955549 in words is "three hundred ninety-four million, nine hundred fifty-five thousand, five hundred forty-nine".