1179944981 has 2 divisors, whose sum is σ = 1179944982. Its totient is φ = 1179944980.

The previous prime is 1179944977. The next prime is 1179944999. The reversal of 1179944981 is 1894499711.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 932386225 + 247558756 = 30535^2 + 15734^2 .

It is a cyclic number.

It is not a de Polignac number, because 1179944981 - 2² = 1179944977 is a prime.

It is a super-2 number, since 2×1179944981² = 2784540316374180722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1179944281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 589972490 + 589972491.

It is an arithmetic number, because the mean of its divisors is an integer number (589972491).

Almost surely, 2^1179944981 is an apocalyptic number.

It is an amenable number.

1179944981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1179944981 is an equidigital number, since it uses as much as digits as its factorization.

1179944981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 653184, while the sum is 53.

The square root of 1179944981 is about 34350.3272327936. The cubic root of 1179944981 is about 1056.7053813376.

The spelling of 1179944981 in words is "one billion, one hundred seventy-nine million, nine hundred forty-four thousand, nine hundred eighty-one".