85997518073 has 2 divisors, whose sum is σ = 85997518074. Its totient is φ = 85997518072.

The previous prime is 85997518067. The next prime is 85997518157. The reversal of 85997518073 is 37081579958.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79731687424 + 6265830649 = 282368^2 + 79157^2 .

It is a cyclic number.

It is not a de Polignac number, because 85997518073 - 2⁸ = 85997517817 is a prime.

It is a super-2 number, since 2×85997518073² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 85997517997 and 85997518015.

It is not a weakly prime, because it can be changed into another prime (85997518063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42998759036 + 42998759037.

It is an arithmetic number, because the mean of its divisors is an integer number (42998759037).

Almost surely, 2^85997518073 is an apocalyptic number.

It is an amenable number.

85997518073 is a deficient number, since it is larger than the sum of its proper divisors (1).

85997518073 is an equidigital number, since it uses as much as digits as its factorization.

85997518073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19051200, while the sum is 62.

The spelling of 85997518073 in words is "eighty-five billion, nine hundred ninety-seven million, five hundred eighteen thousand, seventy-three".