1331161327 has 2 divisors, whose sum is σ = 1331161328. Its totient is φ = 1331161326.

The previous prime is 1331161291. The next prime is 1331161333. The reversal of 1331161327 is 7231611331.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1331161327 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1331161295 and 1331161304.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1331161367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665580663 + 665580664.

It is an arithmetic number, because the mean of its divisors is an integer number (665580664).

Almost surely, 2^1331161327 is an apocalyptic number.

1331161327 is a deficient number, since it is larger than the sum of its proper divisors (1).

1331161327 is an equidigital number, since it uses as much as digits as its factorization.

1331161327 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2268, while the sum is 28.

The square root of 1331161327 is about 36485.0836233110. The cubic root of 1331161327 is about 1100.0444409043.

Adding to 1331161327 its reverse (7231611331), we get a palindrome (8562772658).

The spelling of 1331161327 in words is "one billion, three hundred thirty-one million, one hundred sixty-one thousand, three hundred twenty-seven".