1188990165 has 48 divisors (see below), whose sum is σ = 2097144000. Its totient is φ = 574801920.

The previous prime is 1188990163. The next prime is 1188990167. The reversal of 1188990165 is 5610998811.

It is an interprime number because it is at equal distance from previous prime (1188990163) and next prime (1188990167).

It is not a de Polignac number, because 1188990165 - 2¹ = 1188990163 is a prime.

It is a super-2 number, since 2×1188990165² = 2827395224933454450, which contains 22 as substring.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1188990163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 814206 + ... + 815664.

It is an arithmetic number, because the mean of its divisors is an integer number (43690500).

Almost surely, 2^1188990165 is an apocalyptic number.

1188990165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1188990165 is a deficient number, since it is larger than the sum of its proper divisors (908153835).

1188990165 is a wasteful number, since it uses less digits than its factorization.

1188990165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1938 (or 1927 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 48.

The square root of 1188990165 is about 34481.7366877018. The cubic root of 1188990165 is about 1059.3986636146.

The spelling of 1188990165 in words is "one billion, one hundred eighty-eight million, nine hundred ninety thousand, one hundred sixty-five".