1168677721 has 2 divisors, whose sum is σ = 1168677722. Its totient is φ = 1168677720.

The previous prime is 1168677703. The next prime is 1168677739. The reversal of 1168677721 is 1277768611.

It is a balanced prime because it is at equal distance from previous prime (1168677703) and next prime (1168677739).

It can be written as a sum of positive squares in only one way, i.e., 780587721 + 388090000 = 27939^2 + 19700^2 .

It is a cyclic number.

It is not a de Polignac number, because 1168677721 - 2⁵ = 1168677689 is a prime.

It is not a weakly prime, because it can be changed into another prime (1168677751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 584338860 + 584338861.

It is an arithmetic number, because the mean of its divisors is an integer number (584338861).

Almost surely, 2^1168677721 is an apocalyptic number.

It is an amenable number.

1168677721 is a deficient number, since it is larger than the sum of its proper divisors (1).

1168677721 is an equidigital number, since it uses as much as digits as its factorization.

1168677721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 197568, while the sum is 46.

The square root of 1168677721 is about 34185.9286988082. The cubic root of 1168677721 is about 1053.3311353525.

The spelling of 1168677721 in words is "one billion, one hundred sixty-eight million, six hundred seventy-seven thousand, seven hundred twenty-one".