768201221 has 4 divisors (see below), whose sum is σ = 770655852. Its totient is φ = 765746592.

The previous prime is 768201199. The next prime is 768201223. The reversal of 768201221 is 122102867.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 99720196 + 668481025 = 9986^2 + 25855^2 .

It is a cyclic number.

It is not a de Polignac number, because 768201221 - 2¹⁸ = 767939077 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (768201223) 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, 1226846 + ... + 1227471.

It is an arithmetic number, because the mean of its divisors is an integer number (192663963).

Almost surely, 2^768201221 is an apocalyptic number.

It is an amenable number.

768201221 is a deficient number, since it is larger than the sum of its proper divisors (2454631).

768201221 is a wasteful number, since it uses less digits than its factorization.

768201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2454630.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 768201221 is about 27716.4431520352. The cubic root of 768201221 is about 915.8513664144.

The spelling of 768201221 in words is "seven hundred sixty-eight million, two hundred one thousand, two hundred twenty-one".