768825649 has 2 divisors, whose sum is σ = 768825650. Its totient is φ = 768825648.

The previous prime is 768825647. The next prime is 768825679. The reversal of 768825649 is 946528867.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 425390625 + 343435024 = 20625^2 + 18532^2 .

It is a cyclic number.

It is not a de Polignac number, because 768825649 - 2¹ = 768825647 is a prime.

Together with 768825647, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 768825649.

It is not a weakly prime, because it can be changed into another prime (768825643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 384412824 + 384412825.

It is an arithmetic number, because the mean of its divisors is an integer number (384412825).

Almost surely, 2^768825649 is an apocalyptic number.

It is an amenable number.

768825649 is a deficient number, since it is larger than the sum of its proper divisors (1).

768825649 is an equidigital number, since it uses as much as digits as its factorization.

768825649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5806080, while the sum is 55.

The square root of 768825649 is about 27727.7054405878. The cubic root of 768825649 is about 916.0994474035.

The spelling of 768825649 in words is "seven hundred sixty-eight million, eight hundred twenty-five thousand, six hundred forty-nine".