394834945 has 8 divisors (see below), whose sum is σ = 501672744. Its totient is φ = 297287424.

The previous prime is 394834943. The next prime is 394834949. The reversal of 394834945 is 549438493.

It can be written as a sum of positive squares in 4 ways, for example, as 40755456 + 354079489 = 6384^2 + 18817^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 394834945 - 2¹ = 394834943 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (394834943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2322474 + ... + 2322643.

It is an arithmetic number, because the mean of its divisors is an integer number (62709093).

Almost surely, 2^394834945 is an apocalyptic number.

It is an amenable number.

394834945 is a deficient number, since it is larger than the sum of its proper divisors (106837799).

394834945 is a wasteful number, since it uses less digits than its factorization.

394834945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4645139.

The product of its digits is 1866240, while the sum is 49.

The square root of 394834945 is about 19870.4540713090. The cubic root of 394834945 is about 733.6211798148.

The spelling of 394834945 in words is "three hundred ninety-four million, eight hundred thirty-four thousand, nine hundred forty-five".