1181989006 has 16 divisors (see below), whose sum is σ = 1944856368. Its totient is φ = 534297600.

The previous prime is 1181989001. The next prime is 1181989007. The reversal of 1181989006 is 6009891811.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1181989001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144435 + ... + 152398.

It is an arithmetic number, because the mean of its divisors is an integer number (121553523).

Almost surely, 2^1181989006 is an apocalyptic number.

1181989006 is a deficient number, since it is larger than the sum of its proper divisors (762867362).

1181989006 is a wasteful number, since it uses less digits than its factorization.

1181989006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297027.

The product of its (nonzero) digits is 31104, while the sum is 43.

The square root of 1181989006 is about 34380.0669865549. The cubic root of 1181989006 is about 1057.3152081318.

The spelling of 1181989006 in words is "one billion, one hundred eighty-one million, nine hundred eighty-nine thousand, six".