1138663 has 4 divisors (see below), whose sum is σ = 1142680. Its totient is φ = 1134648.

The previous prime is 1138649. The next prime is 1138667. The reversal of 1138663 is 3668311.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1138663 - 2¹³ = 1130471 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1138667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1548 + ... + 2161.

It is an arithmetic number, because the mean of its divisors is an integer number (285670).

2^1138663 is an apocalyptic number.

1138663 is a deficient number, since it is larger than the sum of its proper divisors (4017).

1138663 is an equidigital number, since it uses as much as digits as its factorization.

1138663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4016.

The product of its digits is 2592, while the sum is 28.

The square root of 1138663 is about 1067.0815339045. The cubic root of 1138663 is about 104.4235378488.

It can be divided in two parts, 11386 and 63, that added together give a square (11449 = 107²).

The spelling of 1138663 in words is "one million, one hundred thirty-eight thousand, six hundred sixty-three".