1187171017 has 2 divisors, whose sum is σ = 1187171018. Its totient is φ = 1187171016.

The previous prime is 1187171003. The next prime is 1187171021. The reversal of 1187171017 is 7101717811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 825068176 + 362102841 = 28724^2 + 19029^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1187171017 is a prime.

It is not a weakly prime, because it can be changed into another prime (1187171087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 593585508 + 593585509.

It is an arithmetic number, because the mean of its divisors is an integer number (593585509).

Almost surely, 2^1187171017 is an apocalyptic number.

It is an amenable number.

1187171017 is a deficient number, since it is larger than the sum of its proper divisors (1).

1187171017 is an equidigital number, since it uses as much as digits as its factorization.

1187171017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2744, while the sum is 34.

The square root of 1187171017 is about 34455.3481625132. The cubic root of 1187171017 is about 1058.8580965791.

Adding to 1187171017 its reverse (7101717811), we get a palindrome (8288888828).

The spelling of 1187171017 in words is "one billion, one hundred eighty-seven million, one hundred seventy-one thousand, seventeen".