1938663 has 12 divisors (see below), whose sum is σ = 2965248. Its totient is φ = 1216320.

The previous prime is 1938659. The next prime is 1938701. The reversal of 1938663 is 3668391.

It is a happy number.

It is not a de Polignac number, because 1938663 - 2² = 1938659 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1938623) 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 11 ways as a sum of consecutive naturals, for example, 6183 + ... + 6488.

It is an arithmetic number, because the mean of its divisors is an integer number (247104).

2^1938663 is an apocalyptic number.

1938663 is a deficient number, since it is larger than the sum of its proper divisors (1026585).

1938663 is a wasteful number, since it uses less digits than its factorization.

1938663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12694 (or 12691 counting only the distinct ones).

The product of its digits is 23328, while the sum is 36.

The square root of 1938663 is about 1392.3587899676. The cubic root of 1938663 is about 124.6907126954.

It can be divided in two parts, 1938 and 663, that added together give a square (2601 = 51²).

The spelling of 1938663 in words is "one million, nine hundred thirty-eight thousand, six hundred sixty-three".