1144787969 has 12 divisors (see below), whose sum is σ = 1257085116. Its totient is φ = 1035984768.

The previous prime is 1144787887. The next prime is 1144787983. The reversal of 1144787969 is 9697874411.

It can be written as a sum of positive squares in 6 ways, for example, as 72880369 + 1071907600 = 8537^2 + 32740^2 .

It is not a de Polignac number, because 1144787969 - 2⁸ = 1144787713 is a prime.

It is a super-2 number, since 2×1144787969² = 2621078987934289922, 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 (1144787269) 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, 887477 + ... + 888765.

It is an arithmetic number, because the mean of its divisors is an integer number (104757093).

Almost surely, 2^1144787969 is an apocalyptic number.

It is an amenable number.

1144787969 is a deficient number, since it is larger than the sum of its proper divisors (112297147).

1144787969 is an frugal number, since it uses more digits than its factorization.

1144787969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2644 (or 1355 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 56.

The square root of 1144787969 is about 33834.7154413924. The cubic root of 1144787969 is about 1046.1043761394.

The spelling of 1144787969 in words is "one billion, one hundred forty-four million, seven hundred eighty-seven thousand, nine hundred sixty-nine".