1663492 has 6 divisors (see below), whose sum is σ = 2911118. Its totient is φ = 831744.

The previous prime is 1663481. The next prime is 1663513. The reversal of 1663492 is 2943661.

It can be written as a sum of positive squares in only one way, i.e., 1331716 + 331776 = 1154^2 + 576^2 .

It is an Ulam number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 207933 + ... + 207940.

2^1663492 is an apocalyptic number.

It is an amenable number.

1663492 is a deficient number, since it is larger than the sum of its proper divisors (1247626).

1663492 is a wasteful number, since it uses less digits than its factorization.

1663492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415877 (or 415875 counting only the distinct ones).

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

The square root of 1663492 is about 1289.7643195561. The cubic root of 1663492 is about 118.4877826307.

The spelling of 1663492 in words is "one million, six hundred sixty-three thousand, four hundred ninety-two".