873806534309 has 2 divisors, whose sum is σ = 873806534310. Its totient is φ = 873806534308.

The previous prime is 873806534291. The next prime is 873806534323. The reversal of 873806534309 is 903435608378.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 652621622500 + 221184911809 = 807850^2 + 470303^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-873806534309 is a prime.

It is a super-2 number, since 2×873806534309² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (873806534389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 436903267154 + 436903267155.

It is an arithmetic number, because the mean of its divisors is an integer number (436903267155).

Almost surely, 2^873806534309 is an apocalyptic number.

It is an amenable number.

873806534309 is a deficient number, since it is larger than the sum of its proper divisors (1).

873806534309 is an equidigital number, since it uses as much as digits as its factorization.

873806534309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13063680, while the sum is 56.

The spelling of 873806534309 in words is "eight hundred seventy-three billion, eight hundred six million, five hundred thirty-four thousand, three hundred nine".