840000097 has 2 divisors, whose sum is σ = 840000098. Its totient is φ = 840000096.

The previous prime is 840000059. The next prime is 840000101. The reversal of 840000097 is 790000048.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 701137441 + 138862656 = 26479^2 + 11784^2 .

It is a cyclic number.

It is not a de Polignac number, because 840000097 - 2¹⁹ = 839475809 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (840000017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 420000048 + 420000049.

It is an arithmetic number, because the mean of its divisors is an integer number (420000049).

Almost surely, 2^840000097 is an apocalyptic number.

It is an amenable number.

840000097 is a deficient number, since it is larger than the sum of its proper divisors (1).

840000097 is an equidigital number, since it uses as much as digits as its factorization.

840000097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 840000097 is about 28982.7551657878. The cubic root of 840000097 is about 943.5388323821.

The spelling of 840000097 in words is "eight hundred forty million, ninety-seven", and thus it is an aban number.