73115687089 has 2 divisors, whose sum is σ = 73115687090. Its totient is φ = 73115687088.

The previous prime is 73115687027. The next prime is 73115687093. The reversal of 73115687089 is 98078651137.

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., 72240000625 + 875686464 = 268775^2 + 29592^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73115687089 is a prime.

It is a super-2 number, since 2×73115687089² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (73115687009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36557843544 + 36557843545.

It is an arithmetic number, because the mean of its divisors is an integer number (36557843545).

Almost surely, 2^73115687089 is an apocalyptic number.

It is an amenable number.

73115687089 is a deficient number, since it is larger than the sum of its proper divisors (1).

73115687089 is an equidigital number, since it uses as much as digits as its factorization.

73115687089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2540160, while the sum is 55.

The spelling of 73115687089 in words is "seventy-three billion, one hundred fifteen million, six hundred eighty-seven thousand, eighty-nine".