1663548 has 12 divisors (see below), whose sum is σ = 3881640. Its totient is φ = 554512.

The previous prime is 1663547. The next prime is 1663549. The reversal of 1663548 is 8453661.

It is an interprime number because it is at equal distance from previous prime (1663547) and next prime (1663549).

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1663547) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69303 + ... + 69326.

It is an arithmetic number, because the mean of its divisors is an integer number (323470).

2^1663548 is an apocalyptic number.

It is an amenable number.

1663548 is an abundant number, since it is smaller than the sum of its proper divisors (2218092).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1663548 is a wasteful number, since it uses less digits than its factorization.

1663548 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138636 (or 138634 counting only the distinct ones).

The product of its digits is 17280, while the sum is 33.

The square root of 1663548 is about 1289.7860287660. The cubic root of 1663548 is about 118.4891122116.

It can be divided in two parts, 1663 and 548, that added together give a triangular number (2211 = T₆₆).

The spelling of 1663548 in words is "one million, six hundred sixty-three thousand, five hundred forty-eight".