768162281 has 2 divisors, whose sum is σ = 768162282. Its totient is φ = 768162280.

The previous prime is 768162271. The next prime is 768162379. The reversal of 768162281 is 182261867.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 717168400 + 50993881 = 26780^2 + 7141^2 .

It is a cyclic number.

It is not a de Polignac number, because 768162281 - 2¹⁸ = 767900137 is a prime.

It is a super-2 number, since 2×768162281² = 1180146579902245922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (768162251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 384081140 + 384081141.

It is an arithmetic number, because the mean of its divisors is an integer number (384081141).

Almost surely, 2^768162281 is an apocalyptic number.

It is an amenable number.

768162281 is a deficient number, since it is larger than the sum of its proper divisors (1).

768162281 is an equidigital number, since it uses as much as digits as its factorization.

768162281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64512, while the sum is 41.

The square root of 768162281 is about 27715.7406720441. The cubic root of 768162281 is about 915.8358913653.

It can be divided in two parts, 76816 and 2281, that added together give a palindrome (79097).

The spelling of 768162281 in words is "seven hundred sixty-eight million, one hundred sixty-two thousand, two hundred eighty-one".