1123749889 has 4 divisors (see below), whose sum is σ = 1182894640. Its totient is φ = 1064605140.

The previous prime is 1123749883. The next prime is 1123749901. The reversal of 1123749889 is 9889473211.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9889473211 = 239 ⋅41378549.

It is a cyclic number.

It is not a de Polignac number, because 1123749889 - 2²⁷ = 989532161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1123749883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29572347 + ... + 29572384.

It is an arithmetic number, because the mean of its divisors is an integer number (295723660).

Almost surely, 2^1123749889 is an apocalyptic number.

1123749889 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1123749889 is a deficient number, since it is larger than the sum of its proper divisors (59144751).

1123749889 is an equidigital number, since it uses as much as digits as its factorization.

1123749889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59144750.

The product of its digits is 870912, while the sum is 52.

The square root of 1123749889 is about 33522.3789281131. The cubic root of 1123749889 is about 1039.6565338317.

The spelling of 1123749889 in words is "one billion, one hundred twenty-three million, seven hundred forty-nine thousand, eight hundred eighty-nine".