8340959172989 has 2 divisors, whose sum is σ = 8340959172990. Its totient is φ = 8340959172988.

The previous prime is 8340959172967. The next prime is 8340959173049. The reversal of 8340959172989 is 9892719590438.

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., 8059069322500 + 281889850489 = 2838850^2 + 530933^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8340959172989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8340959172919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4170479586494 + 4170479586495.

It is an arithmetic number, because the mean of its divisors is an integer number (4170479586495).

Almost surely, 2^{8340959172989} is an apocalyptic number.

It is an amenable number.

8340959172989 is a deficient number, since it is larger than the sum of its proper divisors (1).

8340959172989 is an equidigital number, since it uses as much as digits as its factorization.

8340959172989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 352719360, while the sum is 74.

The spelling of 8340959172989 in words is "eight trillion, three hundred forty billion, nine hundred fifty-nine million, one hundred seventy-two thousand, nine hundred eighty-nine".