1181055361 has 2 divisors, whose sum is σ = 1181055362. Its totient is φ = 1181055360.

The previous prime is 1181055353. The next prime is 1181055367. The reversal of 1181055361 is 1635501811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 738752400 + 442302961 = 27180^2 + 21031^2 .

It is an emirp because it is prime and its reverse (1635501811) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1181055361 - 2³ = 1181055353 is a prime.

It is a super-3 number, since 3×1181055361³ (a number of 28 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (1181055367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 590527680 + 590527681.

It is an arithmetic number, because the mean of its divisors is an integer number (590527681).

Almost surely, 2^1181055361 is an apocalyptic number.

It is an amenable number.

1181055361 is a deficient number, since it is larger than the sum of its proper divisors (1).

1181055361 is an equidigital number, since it uses as much as digits as its factorization.

1181055361 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3600, while the sum is 31.

The square root of 1181055361 is about 34366.4860147208. The cubic root of 1181055361 is about 1057.0367461262.

The spelling of 1181055361 in words is "one billion, one hundred eighty-one million, fifty-five thousand, three hundred sixty-one".