768258221 has 2 divisors, whose sum is σ = 768258222. Its totient is φ = 768258220.

The previous prime is 768258199. The next prime is 768258233. The reversal of 768258221 is 122852867.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 729756196 + 38502025 = 27014^2 + 6205^2 .

It is a cyclic number.

It is not a de Polignac number, because 768258221 - 2¹⁰ = 768257197 is a prime.

It is a Chen prime.

It is equal to p_39595640 and since 768258221 and 39595640 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (768258241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 384129110 + 384129111.

It is an arithmetic number, because the mean of its divisors is an integer number (384129111).

Almost surely, 2^768258221 is an apocalyptic number.

It is an amenable number.

768258221 is a deficient number, since it is larger than the sum of its proper divisors (1).

768258221 is an equidigital number, since it uses as much as digits as its factorization.

768258221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 107520, while the sum is 41.

The square root of 768258221 is about 27717.4714034307. The cubic root of 768258221 is about 915.8740177005.

The spelling of 768258221 in words is "seven hundred sixty-eight million, two hundred fifty-eight thousand, two hundred twenty-one".