1170168809 has 2 divisors, whose sum is σ = 1170168810. Its totient is φ = 1170168808.

The previous prime is 1170168787. The next prime is 1170168851. The reversal of 1170168809 is 9088610711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1016334400 + 153834409 = 31880^2 + 12403^2 .

It is an emirp because it is prime and its reverse (9088610711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1170168809 - 2⁸ = 1170168553 is a prime.

It is not a weakly prime, because it can be changed into another prime (1170168899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 585084404 + 585084405.

It is an arithmetic number, because the mean of its divisors is an integer number (585084405).

Almost surely, 2^1170168809 is an apocalyptic number.

It is an amenable number.

1170168809 is a deficient number, since it is larger than the sum of its proper divisors (1).

1170168809 is an equidigital number, since it uses as much as digits as its factorization.

1170168809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 41.

The square root of 1170168809 is about 34207.7302520936. The cubic root of 1170168809 is about 1053.7789183165.

The spelling of 1170168809 in words is "one billion, one hundred seventy million, one hundred sixty-eight thousand, eight hundred nine".