663473 has 4 divisors (see below), whose sum is σ = 666468. Its totient is φ = 660480.

The previous prime is 663463. The next prime is 663517. The reversal of 663473 is 374366.

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 565504 + 97969 = 752^2 + 313^2 .

It is a cyclic number.

It is not a de Polignac number, because 663473 - 2⁶ = 663409 is a prime.

It is a d-powerful number, because it can be written as 6² + 6⁶ + 4⁹ + 3¹¹ + 7³ + 3¹¹ .

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (663463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1136 + ... + 1617.

It is an arithmetic number, because the mean of its divisors is an integer number (166617).

2⁶⁶³⁴⁷³ is an apocalyptic number.

It is an amenable number.

663473 is a deficient number, since it is larger than the sum of its proper divisors (2995).

663473 is a wasteful number, since it uses less digits than its factorization.

663473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2994.

The product of its digits is 9072, while the sum is 29.

The square root of 663473 is about 814.5385196539. The cubic root of 663473 is about 87.2183268861.

The spelling of 663473 in words is "six hundred sixty-three thousand, four hundred seventy-three".