17933090197 has 12 divisors (see below), whose sum is σ = 19723261068. Its totient is φ = 16293147200.

The previous prime is 17933090191. The next prime is 17933090233. The reversal of 17933090197 is 79109033971.

It can be written as a sum of positive squares in 2 ways, for example, as 4493557156 + 13439533041 = 67034^2 + 115929^2 .

It is not a de Polignac number, because 17933090197 - 2⁷ = 17933090069 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 17933090197.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17933090191) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 165183 + ... + 251299.

It is an arithmetic number, because the mean of its divisors is an integer number (1643605089).

Almost surely, 2^17933090197 is an apocalyptic number.

It is an amenable number.

17933090197 is a deficient number, since it is larger than the sum of its proper divisors (1790170871).

17933090197 is a wasteful number, since it uses less digits than its factorization.

17933090197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87860 (or 87849 counting only the distinct ones).

The product of its (nonzero) digits is 321489, while the sum is 49.

The spelling of 17933090197 in words is "seventeen billion, nine hundred thirty-three million, ninety thousand, one hundred ninety-seven".