11988611 has 4 divisors (see below), whose sum is σ = 12075000. Its totient is φ = 11902224.

The previous prime is 11988607. The next prime is 11988617. The reversal of 11988611 is 11688911.

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

It is a cyclic number.

It is not a de Polignac number, because 11988611 - 2² = 11988607 is a prime.

11988611 is a strobogrammatic number because it is the same when read upside-down.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11988617) 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, 42986 + ... + 43263.

It is an arithmetic number, because the mean of its divisors is an integer number (3018750).

Almost surely, 2^11988611 is an apocalyptic number.

11988611 is a deficient number, since it is larger than the sum of its proper divisors (86389).

11988611 is an equidigital number, since it uses as much as digits as its factorization.

11988611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86388.

The product of its digits is 3456, while the sum is 35.

The square root of 11988611 is about 3462.4573643584. The cubic root of 11988611 is about 228.8703969710.

The spelling of 11988611 in words is "eleven million, nine hundred eighty-eight thousand, six hundred eleven".