8220740837 has 4 divisors (see below), whose sum is σ = 8221136556. Its totient is φ = 8220345120.

The previous prime is 8220740833. The next prime is 8220740863. The reversal of 8220740837 is 7380470228.

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 7264323361 + 956417476 = 85231^2 + 30926^2 .

It is a cyclic number.

It is not a de Polignac number, because 8220740837 - 2² = 8220740833 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8220740794 and 8220740803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8220740833) 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, 164864 + ... + 208857.

It is an arithmetic number, because the mean of its divisors is an integer number (2055284139).

Almost surely, 2^8220740837 is an apocalyptic number.

It is an amenable number.

8220740837 is a deficient number, since it is larger than the sum of its proper divisors (395719).

8220740837 is a wasteful number, since it uses less digits than its factorization.

8220740837 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395718.

The product of its (nonzero) digits is 150528, while the sum is 41.

The square root of 8220740837 is about 90668.3011697032. The cubic root of 8220740837 is about 2018.2284272319.

The spelling of 8220740837 in words is "eight billion, two hundred twenty million, seven hundred forty thousand, eight hundred thirty-seven".