8579890409 has 2 divisors, whose sum is σ = 8579890410. Its totient is φ = 8579890408.

The previous prime is 8579890349. The next prime is 8579890411. The reversal of 8579890409 is 9040989758.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7166130409 + 1413760000 = 84653^2 + 37600^2 .

It is a cyclic number.

It is not a de Polignac number, because 8579890409 - 2²⁰ = 8578841833 is a prime.

It is a super-2 number, since 2×8579890409² (a number of 21 digits) contains 22 as substring.

Together with 8579890411, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (8579893409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4289945204 + 4289945205.

It is an arithmetic number, because the mean of its divisors is an integer number (4289945205).

Almost surely, 2^8579890409 is an apocalyptic number.

It is an amenable number.

8579890409 is a deficient number, since it is larger than the sum of its proper divisors (1).

8579890409 is an equidigital number, since it uses as much as digits as its factorization.

8579890409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6531840, while the sum is 59.

The square root of 8579890409 is about 92627.6978500492. The cubic root of 8579890409 is about 2047.2014487249.

The spelling of 8579890409 in words is "eight billion, five hundred seventy-nine million, eight hundred ninety thousand, four hundred nine".