1145545189 has 2 divisors, whose sum is σ = 1145545190. Its totient is φ = 1145545188.

The previous prime is 1145545183. The next prime is 1145545217. The reversal of 1145545189 is 9815455411.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 710489025 + 435056164 = 26655^2 + 20858^2 .

It is a cyclic number.

It is not a de Polignac number, because 1145545189 - 2⁵ = 1145545157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1145545183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 572772594 + 572772595.

It is an arithmetic number, because the mean of its divisors is an integer number (572772595).

Almost surely, 2^1145545189 is an apocalyptic number.

It is an amenable number.

1145545189 is a deficient number, since it is larger than the sum of its proper divisors (1).

1145545189 is an equidigital number, since it uses as much as digits as its factorization.

1145545189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 144000, while the sum is 43.

The square root of 1145545189 is about 33845.9035778335. The cubic root of 1145545189 is about 1046.3349738831.

It can be divided in two parts, 11455 and 45189, that added together give a square (56644 = 238²).

The spelling of 1145545189 in words is "one billion, one hundred forty-five million, five hundred forty-five thousand, one hundred eighty-nine".