1768375121 has 2 divisors, whose sum is σ = 1768375122. Its totient is φ = 1768375120.

The previous prime is 1768375001. The next prime is 1768375123. The reversal of 1768375121 is 1215738671.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1749330625 + 19044496 = 41825^2 + 4364^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1768375121 is a prime.

Together with 1768375123, 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 (1768375123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 884187560 + 884187561.

It is an arithmetic number, because the mean of its divisors is an integer number (884187561).

Almost surely, 2^1768375121 is an apocalyptic number.

It is an amenable number.

1768375121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1768375121 is an equidigital number, since it uses as much as digits as its factorization.

1768375121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 70560, while the sum is 41.

The square root of 1768375121 is about 42052.0525182779. The cubic root of 1768375121 is about 1209.2742320240.

The spelling of 1768375121 in words is "one billion, seven hundred sixty-eight million, three hundred seventy-five thousand, one hundred twenty-one".