1138192771 has 4 divisors (see below), whose sum is σ = 1138380544. Its totient is φ = 1138005000.

The previous prime is 1138192763. The next prime is 1138192793. The reversal of 1138192771 is 1772918311.

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 1138192771 - 2³ = 1138192763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1138199771) 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, 84480 + ... + 97021.

It is an arithmetic number, because the mean of its divisors is an integer number (284595136).

Almost surely, 2^1138192771 is an apocalyptic number.

1138192771 is a deficient number, since it is larger than the sum of its proper divisors (187773).

1138192771 is an equidigital number, since it uses as much as digits as its factorization.

1138192771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187772.

The product of its digits is 21168, while the sum is 40.

The square root of 1138192771 is about 33737.1126654312. The cubic root of 1138192771 is about 1044.0916141596.

The spelling of 1138192771 in words is "one billion, one hundred thirty-eight million, one hundred ninety-two thousand, seven hundred seventy-one".