8573613121 has 2 divisors, whose sum is σ = 8573613122. Its totient is φ = 8573613120.

The previous prime is 8573613119. The next prime is 8573613127. The reversal of 8573613121 is 1213163758.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4542760000 + 4030853121 = 67400^2 + 63489^2 .

It is a cyclic number.

It is not a de Polignac number, because 8573613121 - 2¹ = 8573613119 is a prime.

Together with 8573613119, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (8573613127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4286806560 + 4286806561.

It is an arithmetic number, because the mean of its divisors is an integer number (4286806561).

Almost surely, 2^8573613121 is an apocalyptic number.

It is an amenable number.

8573613121 is a deficient number, since it is larger than the sum of its proper divisors (1).

8573613121 is an equidigital number, since it uses as much as digits as its factorization.

8573613121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 37.

The square root of 8573613121 is about 92593.8071417306. The cubic root of 8573613121 is about 2046.7020636213.

Adding to 8573613121 its reverse (1213163758), we get a palindrome (9786776879).

The spelling of 8573613121 in words is "eight billion, five hundred seventy-three million, six hundred thirteen thousand, one hundred twenty-one".