1123637138 has 8 divisors (see below), whose sum is σ = 1815106188. Its totient is φ = 518601744.

The previous prime is 1123637087. The next prime is 1123637149. The reversal of 1123637138 is 8317363211.

It can be written as a sum of positive squares in 2 ways, for example, as 931897729 + 191739409 = 30527^2 + 13847^2 .

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1123637098 and 1123637107.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21608381 + ... + 21608432.

Almost surely, 2^1123637138 is an apocalyptic number.

1123637138 is a deficient number, since it is larger than the sum of its proper divisors (691469050).

1123637138 is a wasteful number, since it uses less digits than its factorization.

1123637138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43216828.

The product of its digits is 18144, while the sum is 35.

The square root of 1123637138 is about 33520.6971586213. The cubic root of 1123637138 is about 1039.6217614932.

The spelling of 1123637138 in words is "one billion, one hundred twenty-three million, six hundred thirty-seven thousand, one hundred thirty-eight".