1663494 has 16 divisors (see below), whose sum is σ = 3802368. Its totient is φ = 475272.

The previous prime is 1663481. The next prime is 1663513. The reversal of 1663494 is 4943661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19762 + ... + 19845.

It is an arithmetic number, because the mean of its divisors is an integer number (237648).

2^1663494 is an apocalyptic number.

1663494 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1663494 is an abundant number, since it is smaller than the sum of its proper divisors (2138874).

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

1663494 is a wasteful number, since it uses less digits than its factorization.

1663494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39619.

The product of its digits is 15552, while the sum is 33.

The square root of 1663494 is about 1289.7650948913. The cubic root of 1663494 is about 118.4878301163.

The spelling of 1663494 in words is "one million, six hundred sixty-three thousand, four hundred ninety-four".