1161550189 has 2 divisors, whose sum is σ = 1161550190. Its totient is φ = 1161550188.

The previous prime is 1161550171. The next prime is 1161550241. The reversal of 1161550189 is 9810551611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1124462089 + 37088100 = 33533^2 + 6090^2 .

It is a cyclic number.

It is not a de Polignac number, because 1161550189 - 2²¹ = 1159453037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1161550289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 580775094 + 580775095.

It is an arithmetic number, because the mean of its divisors is an integer number (580775095).

Almost surely, 2^1161550189 is an apocalyptic number.

It is an amenable number.

1161550189 is a deficient number, since it is larger than the sum of its proper divisors (1).

1161550189 is an equidigital number, since it uses as much as digits as its factorization.

1161550189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 37.

The square root of 1161550189 is about 34081.5226919221. The cubic root of 1161550189 is about 1051.1854152456.

The spelling of 1161550189 in words is "one billion, one hundred sixty-one million, five hundred fifty thousand, one hundred eighty-nine".