395044649 has 2 divisors, whose sum is σ = 395044650. Its totient is φ = 395044648.

The previous prime is 395044621. The next prime is 395044703. The reversal of 395044649 is 946440593.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 201640000 + 193404649 = 14200^2 + 13907^2 .

It is a cyclic number.

It is not a de Polignac number, because 395044649 - 2²⁸ = 126609193 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (395044049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197522324 + 197522325.

It is an arithmetic number, because the mean of its divisors is an integer number (197522325).

Almost surely, 2^395044649 is an apocalyptic number.

It is an amenable number.

395044649 is a deficient number, since it is larger than the sum of its proper divisors (1).

395044649 is an equidigital number, since it uses as much as digits as its factorization.

395044649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 466560, while the sum is 44.

The square root of 395044649 is about 19875.7301501102. The cubic root of 395044649 is about 733.7510366656.

The spelling of 395044649 in words is "three hundred ninety-five million, forty-four thousand, six hundred forty-nine".