490723 has 4 divisors (see below), whose sum is σ = 495880. Its totient is φ = 485568.

The previous prime is 490697. The next prime is 490733. The reversal of 490723 is 327094.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-490723 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

490723 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (490733) 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, 2433 + ... + 2626.

It is an arithmetic number, because the mean of its divisors is an integer number (123970).

2⁴⁹⁰⁷²³ is an apocalyptic number.

490723 is a deficient number, since it is larger than the sum of its proper divisors (5157).

490723 is an equidigital number, since it uses as much as digits as its factorization.

490723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5156.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 490723 is about 700.5162382129. The cubic root of 490723 is about 78.8761076812.

The spelling of 490723 in words is "four hundred ninety thousand, seven hundred twenty-three".