8720872543 has 2 divisors, whose sum is σ = 8720872544. Its totient is φ = 8720872542.

The previous prime is 8720872507. The next prime is 8720872549. The reversal of 8720872543 is 3452780278.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8720872543 - 2²¹ = 8718775391 is a prime.

It is a super-2 number, since 2×8720872543² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 8720872493 and 8720872502.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8720872549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4360436271 + 4360436272.

It is an arithmetic number, because the mean of its divisors is an integer number (4360436272).

Almost surely, 2^8720872543 is an apocalyptic number.

8720872543 is a deficient number, since it is larger than the sum of its proper divisors (1).

8720872543 is an equidigital number, since it uses as much as digits as its factorization.

8720872543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 752640, while the sum is 46.

The square root of 8720872543 is about 93385.6120770218. The cubic root of 8720872543 is about 2058.3535830747.

The spelling of 8720872543 in words is "eight billion, seven hundred twenty million, eight hundred seventy-two thousand, five hundred forty-three".