1139263771 has 4 divisors (see below), whose sum is σ = 1139396544. Its totient is φ = 1139131000.

The previous prime is 1139263759. The next prime is 1139263777. The reversal of 1139263771 is 1773629311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1773629311 = 15377 ⋅115343.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1139263771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1139263777) 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, 52555 + ... + 70996.

It is an arithmetic number, because the mean of its divisors is an integer number (284849136).

Almost surely, 2^1139263771 is an apocalyptic number.

1139263771 is a deficient number, since it is larger than the sum of its proper divisors (132773).

1139263771 is an equidigital number, since it uses as much as digits as its factorization.

1139263771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132772.

The product of its digits is 47628, while the sum is 40.

The square root of 1139263771 is about 33752.9816608844. The cubic root of 1139263771 is about 1044.4189961855.

The spelling of 1139263771 in words is "one billion, one hundred thirty-nine million, two hundred sixty-three thousand, seven hundred seventy-one".