768767221 has 4 divisors (see below), whose sum is σ = 769006944. Its totient is φ = 768527500.

The previous prime is 768767191. The next prime is 768767239. The reversal of 768767221 is 122767867.

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 a cyclic number.

It is not a de Polignac number, because 768767221 - 2⁹ = 768766709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (768767521) 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, 114985 + ... + 121486.

It is an arithmetic number, because the mean of its divisors is an integer number (192251736).

Almost surely, 2^768767221 is an apocalyptic number.

It is an amenable number.

768767221 is a deficient number, since it is larger than the sum of its proper divisors (239723).

768767221 is a wasteful number, since it uses less digits than its factorization.

768767221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239722.

The product of its digits is 395136, while the sum is 46.

The square root of 768767221 is about 27726.6518173399. The cubic root of 768767221 is about 916.0762400550.

The spelling of 768767221 in words is "seven hundred sixty-eight million, seven hundred sixty-seven thousand, two hundred twenty-one".