490294681 has 4 divisors (see below), whose sum is σ = 495803700. Its totient is φ = 484785664.

The previous prime is 490294631. The next prime is 490294697. The reversal of 490294681 is 186492094.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 75968656 + 414326025 = 8716^2 + 20355^2 .

It is a cyclic number.

It is not a de Polignac number, because 490294681 - 2²¹ = 488197529 is a prime.

It is a super-2 number, since 2×490294681² = 480777748433783522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (490294631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2754376 + ... + 2754553.

It is an arithmetic number, because the mean of its divisors is an integer number (123950925).

Almost surely, 2^490294681 is an apocalyptic number.

It is an amenable number.

490294681 is a deficient number, since it is larger than the sum of its proper divisors (5509019).

490294681 is an equidigital number, since it uses as much as digits as its factorization.

490294681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5509018.

The product of its (nonzero) digits is 124416, while the sum is 43.

The square root of 490294681 is about 22142.5987860504. The cubic root of 490294681 is about 788.5315245693.

The spelling of 490294681 in words is "four hundred ninety million, two hundred ninety-four thousand, six hundred eighty-one".