8439137197 has 2 divisors, whose sum is σ = 8439137198. Its totient is φ = 8439137196.

The previous prime is 8439137183. The next prime is 8439137227. The reversal of 8439137197 is 7917319348.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4461438436 + 3977698761 = 66794^2 + 63069^2 .

It is a cyclic number.

It is not a de Polignac number, because 8439137197 - 2¹⁹ = 8438612909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8439197197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4219568598 + 4219568599.

It is an arithmetic number, because the mean of its divisors is an integer number (4219568599).

Almost surely, 2^8439137197 is an apocalyptic number.

It is an amenable number.

8439137197 is a deficient number, since it is larger than the sum of its proper divisors (1).

8439137197 is an equidigital number, since it uses as much as digits as its factorization.

8439137197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1143072, while the sum is 52.

The square root of 8439137197 is about 91864.7766937905. The cubic root of 8439137197 is about 2035.9448790824.

The spelling of 8439137197 in words is "eight billion, four hundred thirty-nine million, one hundred thirty-seven thousand, one hundred ninety-seven".