1123991870 has 8 divisors (see below), whose sum is σ = 2023185384. Its totient is φ = 449596744.

The previous prime is 1123991861. The next prime is 1123991909. The reversal of 1123991870 is 781993211.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 56199584 + ... + 56199603.

It is an arithmetic number, because the mean of its divisors is an integer number (252898173).

Almost surely, 2^1123991870 is an apocalyptic number.

1123991870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1123991870 is a deficient number, since it is larger than the sum of its proper divisors (899193514).

1123991870 is a wasteful number, since it uses less digits than its factorization.

1123991870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112399194.

The product of its (nonzero) digits is 27216, while the sum is 41.

The square root of 1123991870 is about 33525.9879794765. The cubic root of 1123991870 is about 1039.7311527704.

The spelling of 1123991870 in words is "one billion, one hundred twenty-three million, nine hundred ninety-one thousand, eight hundred seventy".