1115916589 has 4 divisors (see below), whose sum is σ = 1126345824. Its totient is φ = 1105487356.

The previous prime is 1115916511. The next prime is 1115916611. The reversal of 1115916589 is 9856195111.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1115916589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1115986589) 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, 5214457 + ... + 5214670.

It is an arithmetic number, because the mean of its divisors is an integer number (281586456).

Almost surely, 2^1115916589 is an apocalyptic number.

It is an amenable number.

1115916589 is a deficient number, since it is larger than the sum of its proper divisors (10429235).

1115916589 is a wasteful number, since it uses less digits than its factorization.

1115916589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10429234.

The product of its digits is 97200, while the sum is 46.

The square root of 1115916589 is about 33405.3377321649. The cubic root of 1115916589 is about 1037.2351948949.

The spelling of 1115916589 in words is "one billion, one hundred fifteen million, nine hundred sixteen thousand, five hundred eighty-nine".