1138899773 has 4 divisors (see below), whose sum is σ = 1242436128. Its totient is φ = 1035363420.

The previous prime is 1138899757. The next prime is 1138899779. The reversal of 1138899773 is 3779988311.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3779988311 = 11 ⋅343635301.

It is a cyclic number.

It is not a de Polignac number, because 1138899773 - 2⁴ = 1138899757 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1138899779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51768161 + ... + 51768182.

It is an arithmetic number, because the mean of its divisors is an integer number (310609032).

Almost surely, 2^1138899773 is an apocalyptic number.

It is an amenable number.

1138899773 is a deficient number, since it is larger than the sum of its proper divisors (103536355).

1138899773 is a wasteful number, since it uses less digits than its factorization.

1138899773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103536354.

The product of its digits is 2286144, while the sum is 56.

The square root of 1138899773 is about 33747.5891435225. The cubic root of 1138899773 is about 1044.3077527285.

The spelling of 1138899773 in words is "one billion, one hundred thirty-eight million, eight hundred ninety-nine thousand, seven hundred seventy-three".