1191168643 has 8 divisors (see below), whose sum is σ = 1420524288. Its totient is φ = 976610184.

The previous prime is 1191168617. The next prime is 1191168659. The reversal of 1191168643 is 3468611911.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1191168643 - 2⁹ = 1191168131 is a prime.

It is a super-2 number, since 2×1191168643² = 2837765472132922898, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1191168596 and 1191168605.

It is not an unprimeable number, because it can be changed into a prime (1191168673) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3699121 + ... + 3699442.

It is an arithmetic number, because the mean of its divisors is an integer number (177565536).

Almost surely, 2^1191168643 is an apocalyptic number.

1191168643 is a deficient number, since it is larger than the sum of its proper divisors (229355645).

1191168643 is an equidigital number, since it uses as much as digits as its factorization.

1191168643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7398593.

The product of its digits is 31104, while the sum is 40.

The square root of 1191168643 is about 34513.3110987630. The cubic root of 1191168643 is about 1060.0452819744.

The spelling of 1191168643 in words is "one billion, one hundred ninety-one million, one hundred sixty-eight thousand, six hundred forty-three".