1191079275847 has 2 divisors, whose sum is σ = 1191079275848. Its totient is φ = 1191079275846.

The previous prime is 1191079275781. The next prime is 1191079275851. The reversal of 1191079275847 is 7485729701911.

It is a strong prime.

It is an emirp because it is prime and its reverse (7485729701911) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1191079275847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1191079275877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 595539637923 + 595539637924.

It is an arithmetic number, because the mean of its divisors is an integer number (595539637924).

Almost surely, 2^{1191079275847} is an apocalyptic number.

1191079275847 is a deficient number, since it is larger than the sum of its proper divisors (1).

1191079275847 is an equidigital number, since it uses as much as digits as its factorization.

1191079275847 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8890560, while the sum is 61.

The spelling of 1191079275847 in words is "one trillion, one hundred ninety-one billion, seventy-nine million, two hundred seventy-five thousand, eight hundred forty-seven".