1168761521 has 2 divisors, whose sum is σ = 1168761522. Its totient is φ = 1168761520.

The previous prime is 1168761511. The next prime is 1168761523. The reversal of 1168761521 is 1251678611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 604176400 + 564585121 = 24580^2 + 23761^2 .

It is a cyclic number.

It is not a de Polignac number, because 1168761521 - 2¹⁰ = 1168760497 is a prime.

Together with 1168761523, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1168761523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 584380760 + 584380761.

It is an arithmetic number, because the mean of its divisors is an integer number (584380761).

Almost surely, 2^1168761521 is an apocalyptic number.

It is an amenable number.

1168761521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1168761521 is an equidigital number, since it uses as much as digits as its factorization.

1168761521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 38.

The square root of 1168761521 is about 34187.1543273201. The cubic root of 1168761521 is about 1053.3563111097.

The spelling of 1168761521 in words is "one billion, one hundred sixty-eight million, seven hundred sixty-one thousand, five hundred twenty-one".