1663894 has 16 divisors (see below), whose sum is σ = 2635776. Its totient is φ = 786600.

The previous prime is 1663891. The next prime is 1663913. The reversal of 1663894 is 4983661.

1663894 is nontrivially palindromic in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1663891) 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 7 ways as a sum of consecutive naturals, for example, 2629 + ... + 3199.

It is an arithmetic number, because the mean of its divisors is an integer number (164736).

2^1663894 is an apocalyptic number.

1663894 is a deficient number, since it is larger than the sum of its proper divisors (971882).

1663894 is a wasteful number, since it uses less digits than its factorization.

1663894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 651.

The product of its digits is 31104, while the sum is 37.

The square root of 1663894 is about 1289.9201525676. The cubic root of 1663894 is about 118.4973264602.

The spelling of 1663894 in words is "one million, six hundred sixty-three thousand, eight hundred ninety-four".