768193649 has 2 divisors, whose sum is σ = 768193650. Its totient is φ = 768193648.

The previous prime is 768193631. The next prime is 768193669. The reversal of 768193649 is 946391867.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 579268624 + 188925025 = 24068^2 + 13745^2 .

It is an emirp because it is prime and its reverse (946391867) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 768193649 - 2²⁴ = 751416433 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 768193649.

It is not a weakly prime, because it can be changed into another prime (768193619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 384096824 + 384096825.

It is an arithmetic number, because the mean of its divisors is an integer number (384096825).

Almost surely, 2^768193649 is an apocalyptic number.

It is an amenable number.

768193649 is a deficient number, since it is larger than the sum of its proper divisors (1).

768193649 is an equidigital number, since it uses as much as digits as its factorization.

768193649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1959552, while the sum is 53.

The square root of 768193649 is about 27716.3065540847. The cubic root of 768193649 is about 915.8483572856.

The spelling of 768193649 in words is "seven hundred sixty-eight million, one hundred ninety-three thousand, six hundred forty-nine".