768897449 has 2 divisors, whose sum is σ = 768897450. Its totient is φ = 768897448.

The previous prime is 768897419. The next prime is 768897469. The reversal of 768897449 is 944798867.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 518245225 + 250652224 = 22765^2 + 15832^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-768897449 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 768897391 and 768897400.

It is not a weakly prime, because it can be changed into another prime (768897419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 384448724 + 384448725.

It is an arithmetic number, because the mean of its divisors is an integer number (384448725).

Almost surely, 2^768897449 is an apocalyptic number.

It is an amenable number.

768897449 is a deficient number, since it is larger than the sum of its proper divisors (1).

768897449 is an equidigital number, since it uses as much as digits as its factorization.

768897449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24385536, while the sum is 62.

The square root of 768897449 is about 27729.0001442533. Note that the first 3 decimals coincide. The cubic root of 768897449 is about 916.1279644425.

The spelling of 768897449 in words is "seven hundred sixty-eight million, eight hundred ninety-seven thousand, four hundred forty-nine".