1171278839 has 2 divisors, whose sum is σ = 1171278840. Its totient is φ = 1171278838.

The previous prime is 1171278827. The next prime is 1171278847. The reversal of 1171278839 is 9388721711.

It is a strong prime.

It is an emirp because it is prime and its reverse (9388721711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1171278839 - 2⁸ = 1171278583 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1171278793 and 1171278802.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1171278539) 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 as a sum of consecutive naturals, namely, 585639419 + 585639420.

It is an arithmetic number, because the mean of its divisors is an integer number (585639420).

Almost surely, 2^1171278839 is an apocalyptic number.

1171278839 is a deficient number, since it is larger than the sum of its proper divisors (1).

1171278839 is an equidigital number, since it uses as much as digits as its factorization.

1171278839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 169344, while the sum is 47.

The square root of 1171278839 is about 34223.9512476277. The cubic root of 1171278839 is about 1054.1120202668.

The spelling of 1171278839 in words is "one billion, one hundred seventy-one million, two hundred seventy-eight thousand, eight hundred thirty-nine".