1131177361 has 2 divisors, whose sum is σ = 1131177362. Its totient is φ = 1131177360.

The previous prime is 1131177343. The next prime is 1131177373. The reversal of 1131177361 is 1637711311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 659462400 + 471714961 = 25680^2 + 21719^2 .

It is an emirp because it is prime and its reverse (1637711311) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1131177361 - 2²¹ = 1129080209 is a prime.

It is not a weakly prime, because it can be changed into another prime (1131177301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565588680 + 565588681.

It is an arithmetic number, because the mean of its divisors is an integer number (565588681).

Almost surely, 2^1131177361 is an apocalyptic number.

It is an amenable number.

1131177361 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131177361 is an equidigital number, since it uses as much as digits as its factorization.

1131177361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2646, while the sum is 31.

The square root of 1131177361 is about 33632.9802574794. The cubic root of 1131177361 is about 1041.9420569310.

Adding to 1131177361 its reverse (1637711311), we get a palindrome (2768888672).

The spelling of 1131177361 in words is "one billion, one hundred thirty-one million, one hundred seventy-seven thousand, three hundred sixty-one".