8573353981 has 2 divisors, whose sum is σ = 8573353982. Its totient is φ = 8573353980.

The previous prime is 8573353979. The next prime is 8573354033. The reversal of 8573353981 is 1893533758.

It is an a-pointer prime, because the next prime (8573354033) can be obtained adding 8573353981 to its sum of digits (52).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7605584100 + 967769881 = 87210^2 + 31109^2 .

It is a cyclic number.

It is not a de Polignac number, because 8573353981 - 2¹ = 8573353979 is a prime.

It is a super-2 number, since 2×8573353981² (a number of 21 digits) contains 22 as substring.

Together with 8573353979, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8573353081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4286676990 + 4286676991.

It is an arithmetic number, because the mean of its divisors is an integer number (4286676991).

Almost surely, 2^8573353981 is an apocalyptic number.

It is an amenable number.

8573353981 is a deficient number, since it is larger than the sum of its proper divisors (1).

8573353981 is an equidigital number, since it uses as much as digits as its factorization.

8573353981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2721600, while the sum is 52.

The square root of 8573353981 is about 92592.4077935119. The cubic root of 8573353981 is about 2046.6814426879.

The spelling of 8573353981 in words is "eight billion, five hundred seventy-three million, three hundred fifty-three thousand, nine hundred eighty-one".