490681 has 4 divisors (see below), whose sum is σ = 497664. Its totient is φ = 483700.

The previous prime is 490663. The next prime is 490697. The reversal of 490681 is 186094.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 186094 = 2 ⋅93047.

It is a cyclic number.

It is not a de Polignac number, because 490681 - 2⁹ = 490169 is a prime.

It is a super-2 number, since 2×490681² = 481535687522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (490631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3385 + ... + 3526.

It is an arithmetic number, because the mean of its divisors is an integer number (124416).

2⁴⁹⁰⁶⁸¹ is an apocalyptic number.

It is an amenable number.

490681 is a deficient number, since it is larger than the sum of its proper divisors (6983).

490681 is an equidigital number, since it uses as much as digits as its factorization.

490681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6982.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 490681 is about 700.4862596797. The cubic root of 490681 is about 78.8738573343.

It can be divided in two parts, 4906 and 81, that multiplied together give a triangular number (397386 = T₈₉₁).

The spelling of 490681 in words is "four hundred ninety thousand, six hundred eighty-one".