1155744869 has 4 divisors (see below), whose sum is σ = 1156886796. Its totient is φ = 1154602944.

The previous prime is 1155744827. The next prime is 1155744893. The reversal of 1155744869 is 9684475511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9684475511 = 1663 ⋅5823497.

It can be written as a sum of positive squares in 2 ways, for example, as 585156100 + 570588769 = 24190^2 + 23887^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1155744869 is a prime.

It is a super-2 number, since 2×1155744869² = 2671492404439654322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155741869) 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 3 ways as a sum of consecutive naturals, for example, 569444 + ... + 571469.

It is an arithmetic number, because the mean of its divisors is an integer number (289221699).

Almost surely, 2^1155744869 is an apocalyptic number.

It is an amenable number.

1155744869 is a deficient number, since it is larger than the sum of its proper divisors (1141927).

1155744869 is a wasteful number, since it uses less digits than its factorization.

1155744869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1141926.

The product of its digits is 1209600, while the sum is 50.

The square root of 1155744869 is about 33996.2478664926. The cubic root of 1155744869 is about 1049.4312472329.

The spelling of 1155744869 in words is "one billion, one hundred fifty-five million, seven hundred forty-four thousand, eight hundred sixty-nine".