73197897813 has 12 divisors (see below), whose sum is σ = 105733564300. Its totient is φ = 48797090496.

The previous prime is 73197897809. The next prime is 73197897833. The reversal of 73197897813 is 31879879137.

It can be written as a sum of positive squares in 2 ways, for example, as 55440469764 + 17757428049 = 235458^2 + 133257^2 .

It is not a de Polignac number, because 73197897813 - 2² = 73197897809 is a prime.

It is a super-5 number, since 5×73197897813⁵ (a number of 56 digits) contains 55555 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73197897833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 236745 + ... + 449937.

Almost surely, 2^73197897813 is an apocalyptic number.

It is an amenable number.

73197897813 is a deficient number, since it is larger than the sum of its proper divisors (32535666487).

73197897813 is a wasteful number, since it uses less digits than its factorization.

73197897813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251348 (or 251345 counting only the distinct ones).

The product of its digits is 16003008, while the sum is 63.

The spelling of 73197897813 in words is "seventy-three billion, one hundred ninety-seven million, eight hundred ninety-seven thousand, eight hundred thirteen".