8371492009 has 2 divisors, whose sum is σ = 8371492010. Its totient is φ = 8371492008.

The previous prime is 8371491929. The next prime is 8371492021. The reversal of 8371492009 is 9002941738.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8350304400 + 21187609 = 91380^2 + 4603^2 .

It is a cyclic number.

It is not a de Polignac number, because 8371492009 - 2⁹ = 8371491497 is a prime.

It is not a weakly prime, because it can be changed into another prime (8371492039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4185746004 + 4185746005.

It is an arithmetic number, because the mean of its divisors is an integer number (4185746005).

Almost surely, 2^8371492009 is an apocalyptic number.

It is an amenable number.

8371492009 is a deficient number, since it is larger than the sum of its proper divisors (1).

8371492009 is an equidigital number, since it uses as much as digits as its factorization.

8371492009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 8371492009 is about 91495.8578789226. The cubic root of 8371492009 is about 2030.4904708406.

The spelling of 8371492009 in words is "eight billion, three hundred seventy-one million, four hundred ninety-two thousand, nine".