394530449 has 2 divisors, whose sum is σ = 394530450. Its totient is φ = 394530448.

The previous prime is 394530443. The next prime is 394530491. The reversal of 394530449 is 944035493.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 348494224 + 46036225 = 18668^2 + 6785^2 .

It is an emirp because it is prime and its reverse (944035493) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-394530449 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (394530443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197265224 + 197265225.

It is an arithmetic number, because the mean of its divisors is an integer number (197265225).

Almost surely, 2^394530449 is an apocalyptic number.

It is an amenable number.

394530449 is a deficient number, since it is larger than the sum of its proper divisors (1).

394530449 is an equidigital number, since it uses as much as digits as its factorization.

394530449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 233280, while the sum is 41.

The square root of 394530449 is about 19862.7905642687. The cubic root of 394530449 is about 733.4325422024.

The spelling of 394530449 in words is "three hundred ninety-four million, five hundred thirty thousand, four hundred forty-nine".