1144617889 has 4 divisors (see below), whose sum is σ = 1145915056. Its totient is φ = 1143320724.

The previous prime is 1144617863. The next prime is 1144617911. The reversal of 1144617889 is 9887164411.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1144617889 - 2⁵ = 1144617857 is a prime.

It is a super-2 number, since 2×1144617889² = 2620300223637632642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1144617289) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 647259 + ... + 649024.

It is an arithmetic number, because the mean of its divisors is an integer number (286478764).

Almost surely, 2^1144617889 is an apocalyptic number.

It is an amenable number.

1144617889 is a deficient number, since it is larger than the sum of its proper divisors (1297167).

1144617889 is an equidigital number, since it uses as much as digits as its factorization.

1144617889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1297166.

The product of its digits is 387072, while the sum is 49.

The square root of 1144617889 is about 33832.2019531688. The cubic root of 1144617889 is about 1046.0525673477.

The spelling of 1144617889 in words is "one billion, one hundred forty-four million, six hundred seventeen thousand, eight hundred eighty-nine".