2173506973 has 8 divisors (see below), whose sum is σ = 2399666976. Its totient is φ = 1952108400.

The previous prime is 2173506953. The next prime is 2173506977. The reversal of 2173506973 is 3796053712.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-2173506973 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 (2173506977) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1189398 + ... + 1191223.

It is an arithmetic number, because the mean of its divisors is an integer number (299958372).

Almost surely, 2^2173506973 is an apocalyptic number.

It is an amenable number.

2173506973 is a deficient number, since it is larger than the sum of its proper divisors (226160003).

2173506973 is a wasteful number, since it uses less digits than its factorization.

2173506973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2380715.

The product of its (nonzero) digits is 238140, while the sum is 43.

The square root of 2173506973 is about 46620.8855878993. The cubic root of 2173506973 is about 1295.3496515142.

The spelling of 2173506973 in words is "two billion, one hundred seventy-three million, five hundred six thousand, nine hundred seventy-three".