1663143 has 8 divisors (see below), whose sum is σ = 2242800. Its totient is φ = 1096128.

The previous prime is 1663133. The next prime is 1663147. The reversal of 1663143 is 3413661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1663143 - 2⁹ = 1662631 is a prime.

It is a super-3 number, since 3×1663143³ = 13800983334371955621, which contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1663147) 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, 2848 + ... + 3381.

It is an arithmetic number, because the mean of its divisors is an integer number (280350).

2^1663143 is an apocalyptic number.

1663143 is a deficient number, since it is larger than the sum of its proper divisors (579657).

1663143 is an equidigital number, since it uses as much as digits as its factorization.

1663143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6321.

The product of its digits is 1296, while the sum is 24.

The square root of 1663143 is about 1289.6290164229. The cubic root of 1663143 is about 118.4794958203.

The spelling of 1663143 in words is "one million, six hundred sixty-three thousand, one hundred forty-three".