1139438663 has 4 divisors (see below), whose sum is σ = 1243024008. Its totient is φ = 1035853320.

The previous prime is 1139438603. The next prime is 1139438689. The reversal of 1139438663 is 3668349311.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3668349311 = 11 ⋅333486301.

It is a cyclic number.

It is not a de Polignac number, because 1139438663 - 2²⁰ = 1138390087 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 (1139438603) 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, 51792656 + ... + 51792677.

It is an arithmetic number, because the mean of its divisors is an integer number (310756002).

Almost surely, 2^1139438663 is an apocalyptic number.

1139438663 is a deficient number, since it is larger than the sum of its proper divisors (103585345).

1139438663 is a wasteful number, since it uses less digits than its factorization.

1139438663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103585344.

The product of its digits is 279936, while the sum is 44.

The square root of 1139438663 is about 33755.5723251732. The cubic root of 1139438663 is about 1044.4724374768.

The spelling of 1139438663 in words is "one billion, one hundred thirty-nine million, four hundred thirty-eight thousand, six hundred sixty-three".