8720023577 has 4 divisors (see below), whose sum is σ = 8818001460. Its totient is φ = 8622045696.

The previous prime is 8720023547. The next prime is 8720023579. The reversal of 8720023577 is 7753200278.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7753200278 = 2 ⋅3876600139.

It can be written as a sum of positive squares in 2 ways, for example, as 3758793481 + 4961230096 = 61309^2 + 70436^2 .

It is a cyclic number.

It is not a de Polignac number, because 8720023577 - 2⁶ = 8720023513 is a prime.

It is a super-2 number, since 2×8720023577² (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 (8720023579) 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, 48988808 + ... + 48988985.

It is an arithmetic number, because the mean of its divisors is an integer number (2204500365).

Almost surely, 2^8720023577 is an apocalyptic number.

It is an amenable number.

8720023577 is a deficient number, since it is larger than the sum of its proper divisors (97977883).

8720023577 is an equidigital number, since it uses as much as digits as its factorization.

8720023577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97977882.

The product of its (nonzero) digits is 164640, while the sum is 41.

The square root of 8720023577 is about 93381.0664803096. The cubic root of 8720023577 is about 2058.2867881942.

The spelling of 8720023577 in words is "eight billion, seven hundred twenty million, twenty-three thousand, five hundred seventy-seven".