1161780227 has 2 divisors, whose sum is σ = 1161780228. Its totient is φ = 1161780226.

The previous prime is 1161780199. The next prime is 1161780239. The reversal of 1161780227 is 7220871611.

It is a strong prime.

It is an emirp because it is prime and its reverse (7220871611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1161780227 - 2¹⁶ = 1161714691 is a prime.

It is not a weakly prime, because it can be changed into another prime (1161780247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 580890113 + 580890114.

It is an arithmetic number, because the mean of its divisors is an integer number (580890114).

Almost surely, 2^1161780227 is an apocalyptic number.

1161780227 is a deficient number, since it is larger than the sum of its proper divisors (1).

1161780227 is an equidigital number, since it uses as much as digits as its factorization.

1161780227 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9408, while the sum is 35.

The square root of 1161780227 is about 34084.8973447185. The cubic root of 1161780227 is about 1051.2548043062.

The spelling of 1161780227 in words is "one billion, one hundred sixty-one million, seven hundred eighty thousand, two hundred twenty-seven".