1123979512 has 16 divisors (see below), whose sum is σ = 2107971360. Its totient is φ = 561853824.

The previous prime is 1123979503. The next prime is 1123979513. The reversal of 1123979512 is 2159793211.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123979513) 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, 23953 + ... + 53119.

It is an arithmetic number, because the mean of its divisors is an integer number (131748210).

Almost surely, 2^1123979512 is an apocalyptic number.

It is an amenable number.

1123979512 is a deficient number, since it is larger than the sum of its proper divisors (983991848).

1123979512 is a wasteful number, since it uses less digits than its factorization.

1123979512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33990 (or 33986 counting only the distinct ones).

The product of its digits is 34020, while the sum is 40.

The square root of 1123979512 is about 33525.8036741851. The cubic root of 1123979512 is about 1039.7273422314.

The spelling of 1123979512 in words is "one billion, one hundred twenty-three million, nine hundred seventy-nine thousand, five hundred twelve".