8442621263 has 2 divisors, whose sum is σ = 8442621264. Its totient is φ = 8442621262.

The previous prime is 8442621223. The next prime is 8442621281. The reversal of 8442621263 is 3621262448.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8442621263 - 2¹⁰ = 8442620239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8442621223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4221310631 + 4221310632.

It is an arithmetic number, because the mean of its divisors is an integer number (4221310632).

Almost surely, 2^8442621263 is an apocalyptic number.

8442621263 is a deficient number, since it is larger than the sum of its proper divisors (1).

8442621263 is an equidigital number, since it uses as much as digits as its factorization.

8442621263 is an evil number, because the sum of its binary digits is even.

The product of its digits is 110592, while the sum is 38.

The square root of 8442621263 is about 91883.7377504855. The cubic root of 8442621263 is about 2036.2250179257.

The spelling of 8442621263 in words is "eight billion, four hundred forty-two million, six hundred twenty-one thousand, two hundred sixty-three".