2173444897 has 4 divisors (see below), whose sum is σ = 2340632980. Its totient is φ = 2006256816.

The previous prime is 2173444837. The next prime is 2173444927. The reversal of 2173444897 is 7984443712.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 419594256 + 1753850641 = 20484^2 + 41879^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2173444897 is a prime.

It is a super-3 number, since 3×2173444897³ (a number of 29 digits) contains 333 as substring.

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 2173444897.

It is not an unprimeable number, because it can be changed into a prime (2173444837) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83594022 + ... + 83594047.

It is an arithmetic number, because the mean of its divisors is an integer number (585158245).

Almost surely, 2^2173444897 is an apocalyptic number.

It is an amenable number.

2173444897 is a deficient number, since it is larger than the sum of its proper divisors (167188083).

2173444897 is a wasteful number, since it uses less digits than its factorization.

2173444897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167188082.

The product of its digits is 1354752, while the sum is 49.

The square root of 2173444897 is about 46620.2198300265. The cubic root of 2173444897 is about 1295.3373195408.

The spelling of 2173444897 in words is "two billion, one hundred seventy-three million, four hundred forty-four thousand, eight hundred ninety-seven".