17973156097 has 8 divisors (see below), whose sum is σ = 19438781544. Its totient is φ = 16519398528.

The previous prime is 17973156079. The next prime is 17973156107. The reversal of 17973156097 is 79065137971.

It is a Cunningham number, because it is equal to 134064²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 1 + 17973156096 = 1^2 + 134064^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 17973156097 - 2¹¹ = 17973154049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (17973156497) 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 in 7 ways as a sum of consecutive naturals, for example, 2963818 + ... + 2969875.

It is an arithmetic number, because the mean of its divisors is an integer number (2429847693).

Almost surely, 2^17973156097 is an apocalyptic number.

It is an amenable number.

17973156097 is a deficient number, since it is larger than the sum of its proper divisors (1465625447).

17973156097 is a wasteful number, since it uses less digits than its factorization.

17973156097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5933939.

The product of its (nonzero) digits is 2500470, while the sum is 55.

The spelling of 17973156097 in words is "seventeen billion, nine hundred seventy-three million, one hundred fifty-six thousand, ninety-seven".