2173640197 has 8 divisors (see below), whose sum is σ = 2206857312. Its totient is φ = 2140446000.

The previous prime is 2173640167. The next prime is 2173640201. The reversal of 2173640197 is 7910463712.

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 2173640197 - 2⁷ = 2173640069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2173640107) 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, 375747 + ... + 381487.

It is an arithmetic number, because the mean of its divisors is an integer number (275857164).

Almost surely, 2^2173640197 is an apocalyptic number.

It is an amenable number.

2173640197 is a deficient number, since it is larger than the sum of its proper divisors (33217115).

2173640197 is an equidigital number, since it uses as much as digits as its factorization.

2173640197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11459.

The product of its (nonzero) digits is 63504, while the sum is 40.

The square root of 2173640197 is about 46622.3143676931. The cubic root of 2173640197 is about 1295.3761169053.

The spelling of 2173640197 in words is "two billion, one hundred seventy-three million, six hundred forty thousand, one hundred ninety-seven".