8140873309 has 2 divisors, whose sum is σ = 8140873310. Its totient is φ = 8140873308.

The previous prime is 8140873297. The next prime is 8140873357. The reversal of 8140873309 is 9033780418.

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., 7426647684 + 714225625 = 86178^2 + 26725^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8140873309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8140873369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4070436654 + 4070436655.

It is an arithmetic number, because the mean of its divisors is an integer number (4070436655).

Almost surely, 2^8140873309 is an apocalyptic number.

It is an amenable number.

8140873309 is a deficient number, since it is larger than the sum of its proper divisors (1).

8140873309 is an equidigital number, since it uses as much as digits as its factorization.

8140873309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 8140873309 is about 90226.7882006225. The cubic root of 8140873309 is about 2011.6712014603.

The spelling of 8140873309 in words is "eight billion, one hundred forty million, eight hundred seventy-three thousand, three hundred nine".