8220837617 has 4 divisors (see below), whose sum is σ = 8223892980. Its totient is φ = 8217782256.

The previous prime is 8220837613. The next prime is 8220837619. The reversal of 8220837617 is 7167380228.

It is a happy number.

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 4765278961 + 3455558656 = 69031^2 + 58784^2 .

It is a cyclic number.

It is not a de Polignac number, because 8220837617 - 2² = 8220837613 is a prime.

It is a super-2 number, since 2×8220837617² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8220837613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1523642 + ... + 1529027.

It is an arithmetic number, because the mean of its divisors is an integer number (2055973245).

Almost surely, 2^8220837617 is an apocalyptic number.

It is an amenable number.

8220837617 is a deficient number, since it is larger than the sum of its proper divisors (3055363).

8220837617 is a wasteful number, since it uses less digits than its factorization.

8220837617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3055362.

The product of its (nonzero) digits is 225792, while the sum is 44.

The square root of 8220837617 is about 90668.8348717463. The cubic root of 8220837617 is about 2018.2363471743.

The spelling of 8220837617 in words is "eight billion, two hundred twenty million, eight hundred thirty-seven thousand, six hundred seventeen".