1133445781 has 8 divisors (see below), whose sum is σ = 1223039160. Its totient is φ = 1044196032.

The previous prime is 1133445769. The next prime is 1133445809. The reversal of 1133445781 is 1875443311.

It can be written as a sum of positive squares in 4 ways, for example, as 46225 + 1133399556 = 215^2 + 33666^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1133445781 - 2¹¹ = 1133443733 is a prime.

It is a super-2 number, since 2×1133445781² = 2569398676933399922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1133445781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1133445701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79030 + ... + 92263.

It is an arithmetic number, because the mean of its divisors is an integer number (152879895).

Almost surely, 2^1133445781 is an apocalyptic number.

It is an amenable number.

1133445781 is a deficient number, since it is larger than the sum of its proper divisors (89593379).

1133445781 is a wasteful number, since it uses less digits than its factorization.

1133445781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171815.

The product of its digits is 40320, while the sum is 37.

The square root of 1133445781 is about 33666.6865164958. The cubic root of 1133445781 is about 1042.6380821839.

The spelling of 1133445781 in words is "one billion, one hundred thirty-three million, four hundred forty-five thousand, seven hundred eighty-one".