1663629 has 12 divisors (see below), whose sum is σ = 2438688. Its totient is φ = 1008040.

The previous prime is 1663619. The next prime is 1663681. The reversal of 1663629 is 9263661.

It is a happy number.

It is not a de Polignac number, because 1663629 - 2⁸ = 1663373 is a prime.

It is a super-2 number, since 2×1663629² = 5535322899282, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a d-powerful number, because it can be written as 1 + 6³ + 6³ + 3¹³ + 6⁵ + 2¹¹ + 9⁵ .

It is a self number, because there is not a number n which added to its sum of digits gives 1663629.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1663609) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1929 + ... + 2654.

It is an arithmetic number, because the mean of its divisors is an integer number (203224).

2^1663629 is an apocalyptic number.

It is an amenable number.

1663629 is a deficient number, since it is larger than the sum of its proper divisors (775059).

1663629 is a wasteful number, since it uses less digits than its factorization.

1663629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4608 (or 4597 counting only the distinct ones).

The product of its digits is 11664, while the sum is 33.

The square root of 1663629 is about 1289.8174289410. The cubic root of 1663629 is about 118.4910353025.

The spelling of 1663629 in words is "one million, six hundred sixty-three thousand, six hundred twenty-nine".