1161111137 has 2 divisors, whose sum is σ = 1161111138. Its totient is φ = 1161111136.

The previous prime is 1161111131. The next prime is 1161111157. The reversal of 1161111137 is 7311111611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 937339456 + 223771681 = 30616^2 + 14959^2 .

It is a cyclic number.

It is not a de Polignac number, because 1161111137 - 2¹² = 1161107041 is a prime.

It is not a weakly prime, because it can be changed into another prime (1161111131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 580555568 + 580555569.

It is an arithmetic number, because the mean of its divisors is an integer number (580555569).

Almost surely, 2^1161111137 is an apocalyptic number.

It is an amenable number.

1161111137 is a deficient number, since it is larger than the sum of its proper divisors (1).

1161111137 is an equidigital number, since it uses as much as digits as its factorization.

1161111137 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 126, while the sum is 23.

The square root of 1161111137 is about 34075.0808803149. The cubic root of 1161111137 is about 1051.0529534069.

Adding to 1161111137 its reverse (7311111611), we get a palindrome (8472222748).

The spelling of 1161111137 in words is "one billion, one hundred sixty-one million, one hundred eleven thousand, one hundred thirty-seven".