1663634 has 8 divisors (see below), whose sum is σ = 2851968. Its totient is φ = 712980.

The previous prime is 1663619. The next prime is 1663681. The reversal of 1663634 is 4363661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a plaindrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 1663597 and 1663606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59402 + ... + 59429.

It is an arithmetic number, because the mean of its divisors is an integer number (356496).

2^1663634 is an apocalyptic number.

1663634 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1663634 is a deficient number, since it is larger than the sum of its proper divisors (1188334).

1663634 is a wasteful number, since it uses less digits than its factorization.

1663634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118840.

The product of its digits is 7776, while the sum is 29.

The square root of 1663634 is about 1289.8193671984. The cubic root of 1663634 is about 118.4911540098.

The spelling of 1663634 in words is "one million, six hundred sixty-three thousand, six hundred thirty-four".