1189208189 has 8 divisors (see below), whose sum is σ = 1302393120. Its totient is φ = 1079124336.

The previous prime is 1189208177. The next prime is 1189208213. The reversal of 1189208189 is 9818029811.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1189208189 - 2¹⁶ = 1189142653 is a prime.

It is a super-2 number, since 2×1189208189² = 2828432233569319442, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1189208389) 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, 774467 + ... + 776000.

It is an arithmetic number, because the mean of its divisors is an integer number (162799140).

Almost surely, 2^1189208189 is an apocalyptic number.

It is an amenable number.

1189208189 is a deficient number, since it is larger than the sum of its proper divisors (113184931).

1189208189 is a wasteful number, since it uses less digits than its factorization.

1189208189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1550539.

The product of its (nonzero) digits is 82944, while the sum is 47.

The square root of 1189208189 is about 34484.8979844801. The cubic root of 1189208189 is about 1059.4634133001.

The spelling of 1189208189 in words is "one billion, one hundred eighty-nine million, two hundred eight thousand, one hundred eighty-nine".