8720337361 has 4 divisors (see below), whose sum is σ = 8720556912. Its totient is φ = 8720117812.

The previous prime is 8720337347. The next prime is 8720337383. The reversal of 8720337361 is 1637330278.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1637330278 = 2 ⋅818665139.

It is a cyclic number.

It is not a de Polignac number, because 8720337361 - 2¹⁷ = 8720206289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8720307361) 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, 31675 + ... + 135808.

It is an arithmetic number, because the mean of its divisors is an integer number (2180139228).

Almost surely, 2^8720337361 is an apocalyptic number.

It is an amenable number.

8720337361 is a deficient number, since it is larger than the sum of its proper divisors (219551).

8720337361 is a wasteful number, since it uses less digits than its factorization.

8720337361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219550.

The product of its (nonzero) digits is 127008, while the sum is 40.

The square root of 8720337361 is about 93382.7465916483. The cubic root of 8720337361 is about 2058.3114765722.

The spelling of 8720337361 in words is "eight billion, seven hundred twenty million, three hundred thirty-seven thousand, three hundred sixty-one".