1171839855 has 8 divisors (see below), whose sum is σ = 1874943792. Its totient is φ = 624981248.

The previous prime is 1171839847. The next prime is 1171839863. The reversal of 1171839855 is 5589381711.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1171839847) and next prime (1171839863).

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 1171839855 - 2³ = 1171839847 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39061314 + ... + 39061343.

It is an arithmetic number, because the mean of its divisors is an integer number (234367974).

Almost surely, 2^1171839855 is an apocalyptic number.

1171839855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1171839855 is a deficient number, since it is larger than the sum of its proper divisors (703103937).

1171839855 is an equidigital number, since it uses as much as digits as its factorization.

1171839855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78122665.

The product of its digits is 302400, while the sum is 48.

The square root of 1171839855 is about 34232.1465146432. The cubic root of 1171839855 is about 1054.2802919872.

The spelling of 1171839855 in words is "one billion, one hundred seventy-one million, eight hundred thirty-nine thousand, eight hundred fifty-five".