1573663 has 8 divisors (see below), whose sum is σ = 1936928. Its totient is φ = 1245024.

The previous prime is 1573651. The next prime is 1573667. The reversal of 1573663 is 3663751.

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 1573663 - 2⁹ = 1573151 is a prime.

1573663 is a lucky number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1573667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8556 + ... + 8737.

It is an arithmetic number, because the mean of its divisors is an integer number (242116).

2^1573663 is an apocalyptic number.

1573663 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1573663 is a deficient number, since it is larger than the sum of its proper divisors (363265).

1573663 is a wasteful number, since it uses less digits than its factorization.

1573663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17313.

The product of its digits is 11340, while the sum is 31.

The square root of 1573663 is about 1254.4572531577. The cubic root of 1573663 is about 116.3154069817.

The spelling of 1573663 in words is "one million, five hundred seventy-three thousand, six hundred sixty-three".