8220470639 has 2 divisors, whose sum is σ = 8220470640. Its totient is φ = 8220470638.

The previous prime is 8220470627. The next prime is 8220470647. The reversal of 8220470639 is 9360740228.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8220470639 - 2²⁸ = 7952035183 is a prime.

It is a super-2 number, since 2×8220470639² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 8220470596 and 8220470605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8220470659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4110235319 + 4110235320.

It is an arithmetic number, because the mean of its divisors is an integer number (4110235320).

Almost surely, 2^8220470639 is an apocalyptic number.

8220470639 is a deficient number, since it is larger than the sum of its proper divisors (1).

8220470639 is an equidigital number, since it uses as much as digits as its factorization.

8220470639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 41.

The square root of 8220470639 is about 90666.8111218212. The cubic root of 8220470639 is about 2018.2063153862.

The spelling of 8220470639 in words is "eight billion, two hundred twenty million, four hundred seventy thousand, six hundred thirty-nine".