73873385389 has 2 divisors, whose sum is σ = 73873385390. Its totient is φ = 73873385388.

The previous prime is 73873385387. The next prime is 73873385413. The reversal of 73873385389 is 98358337837.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48999364164 + 24874021225 = 221358^2 + 157715^2 .

It is a cyclic number.

It is not a de Polignac number, because 73873385389 - 2¹ = 73873385387 is a prime.

Together with 73873385387, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 73873385389.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73873385381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36936692694 + 36936692695.

It is an arithmetic number, because the mean of its divisors is an integer number (36936692695).

Almost surely, 2^73873385389 is an apocalyptic number.

It is an amenable number.

73873385389 is a deficient number, since it is larger than the sum of its proper divisors (1).

73873385389 is an equidigital number, since it uses as much as digits as its factorization.

73873385389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 91445760, while the sum is 64.

The spelling of 73873385389 in words is "seventy-three billion, eight hundred seventy-three million, three hundred eighty-five thousand, three hundred eighty-nine".