494217945 has 48 divisors (see below), whose sum is σ = 928588752. Its totient is φ = 241712640.

The previous prime is 494217943. The next prime is 494217961. The reversal of 494217945 is 549712494.

It can be written as a sum of positive squares in 8 ways, for example, as 98247744 + 395970201 = 9912^2 + 19899^2 .

It is not a de Polignac number, because 494217945 - 2¹ = 494217943 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 494217945.

It is not an unprimeable number, because it can be changed into a prime (494217943) 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 in 47 ways as a sum of consecutive naturals, for example, 89155 + ... + 94535.

It is an arithmetic number, because the mean of its divisors is an integer number (19345599).

Almost surely, 2^494217945 is an apocalyptic number.

494217945 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

494217945 is a deficient number, since it is larger than the sum of its proper divisors (434370807).

494217945 is a wasteful number, since it uses less digits than its factorization.

494217945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5562 (or 5559 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 494217945 is about 22231.0131348079. The cubic root of 494217945 is about 790.6291761771.

The spelling of 494217945 in words is "four hundred ninety-four million, two hundred seventeen thousand, nine hundred forty-five".