1123511389 has 16 divisors (see below), whose sum is σ = 1508492160. Its totient is φ = 808119360.

The previous prime is 1123511339. The next prime is 1123511399. The reversal of 1123511389 is 9831153211.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1123511389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123511339) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 560194 + ... + 562195.

It is an arithmetic number, because the mean of its divisors is an integer number (94280760).

Almost surely, 2^1123511389 is an apocalyptic number.

It is an amenable number.

1123511389 is a deficient number, since it is larger than the sum of its proper divisors (384980771).

1123511389 is a wasteful number, since it uses less digits than its factorization.

1123511389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1122420.

The product of its digits is 6480, while the sum is 34.

The square root of 1123511389 is about 33518.8214142443. The cubic root of 1123511389 is about 1039.5829778357.

The spelling of 1123511389 in words is "one billion, one hundred twenty-three million, five hundred eleven thousand, three hundred eighty-nine".