768244857 has 4 divisors (see below), whose sum is σ = 1024326480. Its totient is φ = 512163236.

The previous prime is 768244853. The next prime is 768244861. The reversal of 768244857 is 758442867.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (768244853) and next prime (768244861).

It is a cyclic number.

It is not a de Polignac number, because 768244857 - 2² = 768244853 is a prime.

It is not an unprimeable number, because it can be changed into a prime (768244853) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128040807 + ... + 128040812.

It is an arithmetic number, because the mean of its divisors is an integer number (256081620).

Almost surely, 2^768244857 is an apocalyptic number.

It is an amenable number.

768244857 is a deficient number, since it is larger than the sum of its proper divisors (256081623).

768244857 is a wasteful number, since it uses less digits than its factorization.

768244857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256081622.

The product of its digits is 3010560, while the sum is 51.

The square root of 768244857 is about 27717.2303270006. The cubic root of 768244857 is about 915.8687070679.

The spelling of 768244857 in words is "seven hundred sixty-eight million, two hundred forty-four thousand, eight hundred fifty-seven".