1663924 has 12 divisors (see below), whose sum is σ = 2921184. Its totient is φ = 829304.

The previous prime is 1663919. The next prime is 1663951. The reversal of 1663924 is 4293661.

It is a congruent number.

It is an unprimeable number.

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, 1599 + ... + 2425.

It is an arithmetic number, because the mean of its divisors is an integer number (243432).

2^1663924 is an apocalyptic number.

It is an amenable number.

1663924 is a deficient number, since it is larger than the sum of its proper divisors (1257260).

1663924 is a wasteful number, since it uses less digits than its factorization.

1663924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1334 (or 1332 counting only the distinct ones).

The product of its digits is 7776, while the sum is 31.

The square root of 1663924 is about 1289.9317811419. The cubic root of 1663924 is about 118.4980386247.

The spelling of 1663924 in words is "one million, six hundred sixty-three thousand, nine hundred twenty-four".