494390681 has 8 divisors (see below), whose sum is σ = 516192000. Its totient is φ = 472614912.

The previous prime is 494390671. The next prime is 494390711. The reversal of 494390681 is 186093494.

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 494390681 - 2¹⁰ = 494389657 is a prime.

It is a super-2 number, since 2×494390681² = 488844290919287522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (494390671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40601 + ... + 51353.

It is an arithmetic number, because the mean of its divisors is an integer number (64524000).

Almost surely, 2^494390681 is an apocalyptic number.

It is an amenable number.

494390681 is a deficient number, since it is larger than the sum of its proper divisors (21801319).

494390681 is a wasteful number, since it uses less digits than its factorization.

494390681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12775.

The product of its (nonzero) digits is 186624, while the sum is 44.

The square root of 494390681 is about 22234.8978185194. The cubic root of 494390681 is about 790.7212773879.

The spelling of 494390681 in words is "four hundred ninety-four million, three hundred ninety thousand, six hundred eighty-one".