1131481773 has 12 divisors (see below), whose sum is σ = 1657382688. Its totient is φ = 743696520.

The previous prime is 1131481759. The next prime is 1131481811. The reversal of 1131481773 is 3771841311.

It is not a de Polignac number, because 1131481773 - 2⁶ = 1131481709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131481753) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 884715 + ... + 885992.

It is an arithmetic number, because the mean of its divisors is an integer number (138115224).

Almost surely, 2^1131481773 is an apocalyptic number.

It is an amenable number.

1131481773 is a deficient number, since it is larger than the sum of its proper divisors (525900915).

1131481773 is a wasteful number, since it uses less digits than its factorization.

1131481773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1770784 (or 1770781 counting only the distinct ones).

The product of its digits is 14112, while the sum is 36.

The square root of 1131481773 is about 33637.5054515046. The cubic root of 1131481773 is about 1042.0355144879.

It can be divided in two parts, 113148 and 1773, that added together give a square (114921 = 339²).

The spelling of 1131481773 in words is "one billion, one hundred thirty-one million, four hundred eighty-one thousand, seven hundred seventy-three".