8572872857 has 2 divisors, whose sum is σ = 8572872858. Its totient is φ = 8572872856.

The previous prime is 8572872853. The next prime is 8572872911. The reversal of 8572872857 is 7582782758.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4385618176 + 4187254681 = 66224^2 + 64709^2 .

It is a cyclic number.

It is not a de Polignac number, because 8572872857 - 2² = 8572872853 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8572872796 and 8572872805.

It is not a weakly prime, because it can be changed into another prime (8572872851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4286436428 + 4286436429.

It is an arithmetic number, because the mean of its divisors is an integer number (4286436429).

Almost surely, 2^8572872857 is an apocalyptic number.

It is an amenable number.

8572872857 is a deficient number, since it is larger than the sum of its proper divisors (1).

8572872857 is an equidigital number, since it uses as much as digits as its factorization.

8572872857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17561600, while the sum is 59.

The square root of 8572872857 is about 92589.8096822755. The cubic root of 8572872857 is about 2046.6431563888.

Subtracting from 8572872857 its reverse (7582782758), we obtain a palindrome (990090099).

The spelling of 8572872857 in words is "eight billion, five hundred seventy-two million, eight hundred seventy-two thousand, eight hundred fifty-seven".