1171142897 has 2 divisors, whose sum is σ = 1171142898. Its totient is φ = 1171142896.

The previous prime is 1171142849. The next prime is 1171142899. The reversal of 1171142897 is 7982411711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1132255201 + 38887696 = 33649^2 + 6236^2 .

It is an emirp because it is prime and its reverse (7982411711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1171142897 - 2²⁶ = 1104034033 is a prime.

It is a super-3 number, since 3×1171142897³ (a number of 28 digits) contains 333 as substring.

Together with 1171142899, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1171142899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 585571448 + 585571449.

It is an arithmetic number, because the mean of its divisors is an integer number (585571449).

Almost surely, 2^1171142897 is an apocalyptic number.

It is an amenable number.

1171142897 is a deficient number, since it is larger than the sum of its proper divisors (1).

1171142897 is an equidigital number, since it uses as much as digits as its factorization.

1171142897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28224, while the sum is 41.

The square root of 1171142897 is about 34221.9651247558. The cubic root of 1171142897 is about 1054.0712375953.

The spelling of 1171142897 in words is "one billion, one hundred seventy-one million, one hundred forty-two thousand, eight hundred ninety-seven".