1171216667 has 4 divisors (see below), whose sum is σ = 1172364816. Its totient is φ = 1170068520.

The previous prime is 1171216661. The next prime is 1171216679. The reversal of 1171216667 is 7666121711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7666121711 = 89 ⋅86136199.

It is a cyclic number.

It is not a de Polignac number, because 1171216667 - 2²⁰ = 1170168091 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 1171216667.

It is not an unprimeable number, because it can be changed into a prime (1171216661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 572543 + ... + 574584.

It is an arithmetic number, because the mean of its divisors is an integer number (293091204).

Almost surely, 2^1171216667 is an apocalyptic number.

1171216667 is a deficient number, since it is larger than the sum of its proper divisors (1148149).

1171216667 is a wasteful number, since it uses less digits than its factorization.

1171216667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1148148.

The product of its digits is 21168, while the sum is 38.

The square root of 1171216667 is about 34223.0429243222. The cubic root of 1171216667 is about 1054.0933690257.

The spelling of 1171216667 in words is "one billion, one hundred seventy-one million, two hundred sixteen thousand, six hundred sixty-seven".