1188870889 has 4 divisors (see below), whose sum is σ = 1191865924. Its totient is φ = 1185875856.

The previous prime is 1188870883. The next prime is 1188870941. The reversal of 1188870889 is 9880788811.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 313006864 + 875864025 = 17692^2 + 29595^2 .

It is a cyclic number.

It is not a de Polignac number, because 1188870889 - 2²¹ = 1186773737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1188870883) 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, 1496922 + ... + 1497715.

It is an arithmetic number, because the mean of its divisors is an integer number (297966481).

Almost surely, 2^1188870889 is an apocalyptic number.

It is an amenable number.

1188870889 is a deficient number, since it is larger than the sum of its proper divisors (2995035).

1188870889 is an equidigital number, since it uses as much as digits as its factorization.

1188870889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2995034.

The product of its (nonzero) digits is 2064384, while the sum is 58.

The square root of 1188870889 is about 34480.0070910666. The cubic root of 1188870889 is about 1059.3632371762.

The spelling of 1188870889 in words is "one billion, one hundred eighty-eight million, eight hundred seventy thousand, eight hundred eighty-nine".