768067649 has 2 divisors, whose sum is σ = 768067650. Its totient is φ = 768067648.

The previous prime is 768067627. The next prime is 768067669. The reversal of 768067649 is 946760867.

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., 507826225 + 260241424 = 22535^2 + 16132^2 .

It is a cyclic number.

It is not a de Polignac number, because 768067649 - 2¹⁶ = 768002113 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 768067649.

It is not a weakly prime, because it can be changed into another prime (768067669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 384033824 + 384033825.

It is an arithmetic number, because the mean of its divisors is an integer number (384033825).

Almost surely, 2^768067649 is an apocalyptic number.

It is an amenable number.

768067649 is a deficient number, since it is larger than the sum of its proper divisors (1).

768067649 is an equidigital number, since it uses as much as digits as its factorization.

768067649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3048192, while the sum is 53.

The square root of 768067649 is about 27714.0334307369. The cubic root of 768067649 is about 915.7982817163.

The spelling of 768067649 in words is "seven hundred sixty-eight million, sixty-seven thousand, six hundred forty-nine".