1663479 has 6 divisors (see below), whose sum is σ = 2402816. Its totient is φ = 1108980.

The previous prime is 1663477. The next prime is 1663481. The reversal of 1663479 is 9743661.

1663479 is a `hidden beast` number, since 16 + 634 + 7 + 9 = 666.

It is an interprime number because it is at equal distance from previous prime (1663477) and next prime (1663481).

It is not a de Polignac number, because 1663479 - 2¹ = 1663477 is a prime.

It is a super-3 number, since 3×1663479³ = 13809349543332153717, which contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1663477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 92407 + ... + 92424.

2^1663479 is an apocalyptic number.

1663479 is a deficient number, since it is larger than the sum of its proper divisors (739337).

1663479 is a wasteful number, since it uses less digits than its factorization.

1663479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184837 (or 184834 counting only the distinct ones).

The product of its digits is 27216, while the sum is 36.

The square root of 1663479 is about 1289.7592798658. The cubic root of 1663479 is about 118.4874739737.

The spelling of 1663479 in words is "one million, six hundred sixty-three thousand, four hundred seventy-nine".