1144576989 has 6 divisors (see below), whose sum is σ = 1653277886. Its totient is φ = 763051320.

The previous prime is 1144576963. The next prime is 1144576997. The reversal of 1144576989 is 9896754411.

It can be written as a sum of positive squares in only one way, i.e., 1118902500 + 25674489 = 33450^2 + 5067^2 .

It is not a de Polignac number, because 1144576989 - 2⁷ = 1144576861 is a prime.

It is a super-2 number, since 2×1144576989² = 2620112967496612242, 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 (1144576949) 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 5 ways as a sum of consecutive naturals, for example, 63587602 + ... + 63587619.

Almost surely, 2^1144576989 is an apocalyptic number.

It is an amenable number.

1144576989 is a deficient number, since it is larger than the sum of its proper divisors (508700897).

1144576989 is a wasteful number, since it uses less digits than its factorization.

1144576989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127175227 (or 127175224 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 54.

The square root of 1144576989 is about 33831.5974940587. The cubic root of 1144576989 is about 1046.0401078594.

The spelling of 1144576989 in words is "one billion, one hundred forty-four million, five hundred seventy-six thousand, nine hundred eighty-nine".