1168494209 has 4 divisors (see below), whose sum is σ = 1169818416. Its totient is φ = 1167170004.

The previous prime is 1168494163. The next prime is 1168494221. The reversal of 1168494209 is 9024948611.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9024948611 = 7 ⋅1289278373.

It is a cyclic number.

It is not a de Polignac number, because 1168494209 - 2¹⁶ = 1168428673 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1168494209.

It is not an unprimeable number, because it can be changed into a prime (1168494259) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 660779 + ... + 662544.

It is an arithmetic number, because the mean of its divisors is an integer number (292454604).

Almost surely, 2^1168494209 is an apocalyptic number.

It is an amenable number.

1168494209 is a deficient number, since it is larger than the sum of its proper divisors (1324207).

1168494209 is an equidigital number, since it uses as much as digits as its factorization.

1168494209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1324206.

The product of its (nonzero) digits is 124416, while the sum is 44.

The square root of 1168494209 is about 34183.2445651375. The cubic root of 1168494209 is about 1053.2759992449.

The spelling of 1168494209 in words is "one billion, one hundred sixty-eight million, four hundred ninety-four thousand, two hundred nine".