768408181 has 2 divisors, whose sum is σ = 768408182. Its totient is φ = 768408180.

The previous prime is 768408167. The next prime is 768408187. The reversal of 768408181 is 181804867.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 616280625 + 152127556 = 24825^2 + 12334^2 .

It is a cyclic number.

It is not a de Polignac number, because 768408181 - 2⁵ = 768408149 is a prime.

It is a super-2 number, since 2×768408181² = 1180902265255457522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (768408187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 384204090 + 384204091.

It is an arithmetic number, because the mean of its divisors is an integer number (384204091).

Almost surely, 2^768408181 is an apocalyptic number.

It is an amenable number.

768408181 is a deficient number, since it is larger than the sum of its proper divisors (1).

768408181 is an equidigital number, since it uses as much as digits as its factorization.

768408181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 86016, while the sum is 43.

The square root of 768408181 is about 27720.1764244025. The cubic root of 768408181 is about 915.9336051016.

The spelling of 768408181 in words is "seven hundred sixty-eight million, four hundred eight thousand, one hundred eighty-one".